AI Compare AI Compare

Check prices, features and limits.

Pricing market
Automatic
Language
EN

Audio & Voice

Audio and voice AI generates speech and music or cleans up recordings. Podcasts, ads and audiobooks need clear speech and clear licence terms. Here you compare AI tools for voice, transcription and music with prices, limits and sources.

Filter by subcategory

Sort

ACE Studio

Music generation

AI music studio for vocals from MIDI and lyrics, voice cloning, instruments, stem splitting, and music or effects for video.

Free accessFree plan100 monthly credits for registered accounts, not full free desktop access.
Paid fromArtist Rent-to-own · $16.58160+ royalty-free voices and 40+ instruments; unlimited vocal and instrument generation under the plan
  • Editable AI vocals from MIDI and lyrics
  • AI instruments and DAW integration through ACE Bridge

Details Visit site (opens in a new tab)

AIVA

Music generation

Create and edit AI instrumental music, then download it with plan-specific export and usage rights.

Free accessFree plan3 downloads per month, up to 3 minutes per track; non-commercial only with AIVA attribution.
Paid fromStandard · Not verified for this market15 downloads/month, up to 5 minutes per track
  • AI composition with editing and MIDI export
  • Separate download and generation limits

Details Visit site (opens in a new tab)

Altered AI

Voice & speech

Voice AI platform with speech-to-speech morphing, cloning, text-to-speech, and a real-time voice changer for calls and games.

Free accessFree plan3 minutes of online morphing/month; Conflicting Free tokens: plan card 10,000, comparison table 1,000; Non-commercial publication with attribution only; no token rollover
Paid fromAltered Studio - Creator (annual) · 30 USD60 online morphing minutes and 325,000 AI tokens/month; unused tokens roll over
  • Studio: cloning, speech-to-speech, TTS and audio editing
  • Real-Time Pro Call Center: Accent Translation, Voice Skins and Isolate; unlimited processing

Details Visit site (opens in a new tab)

Amberscript

Audio editing & restoration

Automatic transcription and subtitles with optional human editing.

Free accessOne-off free allowanceNew accounts: 10 minutes of automatic transcription/subtitles without payment details
Paid fromStarter · Not verified for this market5 hours per month
  • Automatic transcription and subtitles in over 90 languages; online editor
  • Over 18 languages; editing by language professionals

Details Visit site (opens in a new tab)

A

Amped Studio

Music generation

Browser-based multitrack DAW with VST3 support; the music assistant, stem splitter, and voice changer are reserved for a separate paid AI tier.

Free accessnot published5 projects, 16 tracks, MP3 only, AI demo-only.
Paid fromPremium · 5.99 USD50 projects, unlimited tracks and exports
  • Browser-based DAW with no install and cloud project storage
  • VST3 plugin support from the Premium tier

Details Visit site (opens in a new tab)

Aqua Voice

Voice & speech

Cloud-based dictation for macOS, Windows and iOS, plus a separately billed Avalon API for audio files.

Free accessFree trial
Paid fromPro (monthly) · 10 USDUnlimited dictation
  • Cloud-based dictation for macOS, Windows and iOS, plus a separately billed Avalon API for audio files.
  • Custom Instructions and expanded dictionary

Details Visit site (opens in a new tab)

AssemblyAI

Audio editing & restoration

Developer platform for file, streaming and short-clip transcription, speech analysis, LLM access and managed voice agents.

Free accessOne-off free allowance
Paid fromPre-recorded / Universal-2 · 0.15 USD99 languages; keyterms included
  • File transcription, realtime streaming and Sync API for short clips
  • Free starter credits, not an ongoing unlimited free API plan

Details Visit site (opens in a new tab)

Async

Audio editing & restoration

Browser platform for audio and video recording, editing, AI generation, subtitles, voices and team production.

Free accessFree planFree access. Free credits conflict: 10 under a monthly heading or 150 lifetime
Paid fromEssentials / 450 / monthly · 19.99 USD450 credits per month; monthly reset without rollover
  • Browser-based recording and audio/video editing
  • AI generation and chat-based editing with plan-dependent credits

Details Visit site (opens in a new tab)

AudioPen

Audio editing & restoration

AudioPen turns personal voice notes into structured text or a plain transcript. It does not join meetings or label speakers.

Free accessFree plan
Paid fromPrime (3 months) · 33 USDRecordings up to 15 minutes; unlimited note storage
  • Recordings up to 15 minutes; unlimited note storage
  • 100 audio file uploads every 4 weeks, maximum 100 MB per file

Details Visit site (opens in a new tab)

Audiostrip

Audio editing & restoration

AudioStrip separates vocals and instrumentals, processes noise and mastering, and provides key and BPM lookup.

Free accessFree plan
Paid fromPremium Plan · 5.99 GBPUnlimited isolations, masterings and enhancements; up to 200 MB and 20 minutes per upload
  • AudioStrip separates vocals and instrumentals, processes noise and mastering, and provides key and BPM lookup.
  • Unlimited isolations, masterings and enhancements; up to 200 MB and 20 minutes per upload

Details Visit site (opens in a new tab)

Auphonic

Audio editing & restoration

Auphonic automates loudness normalisation, levelling, noise and reverb reduction, editing and podcast publishing. Paid plans add speech recognition and automatic show notes.

Free accessFree plan
Paid fromRecurring S · 13 USD9 hours/month; unused hours expire monthly
  • Auphonic automates loudness normalisation, levelling, noise and reverb reduction, editing and podcast publishing. Paid plans add speech recognition and automatic show notes.
  • No jingle; speech recognition, automatic show notes, watch folders and batch processing

Details Visit site (opens in a new tab)

B

Beatoven.ai

Music generation

Generate custom background music and sound effects with the in-house Maestro model; current tier pricing is not reachable on the official site.

Free accessnot publishedNo publicly documented free tier since the pricing page is unreachable.
Paid fromUsage · Not verified for this marketDownload in MP3 or WAV
  • Maestro Music: in-house model for custom-described background music
  • Maestro Sound Effects: AI foley effects directly from a prompt description

Details Visit site (opens in a new tab)

Bland AI

Voice & speech

Programmable AI phone agents for inbound and outbound calls, with per-minute billing and separate telephony costs.

Free accessOne-off free allowance
Paid fromStart · 0 USD + 0.14 USD/minUSD 0 monthly base fee; USD 0.14 per connected call minute
  • Build and Scale raise concurrency and daily caps while lowering minute rates. Limits are not free minutes included in the base fee.
  • 10 concurrent calls; 100 calls per day and 100 per hour

Details Visit site (opens in a new tab)

Boomy

Music generation

Create and edit AI songs; use paid downloads commercially and publish through a distributor of your choice.

Free accessFree plan
Paid fromCreator · 9.99 USD500 song saves in total
  • Create songs and edit with basic tools
  • 500 song saves in total

Details Visit site (opens in a new tab)

Cartesia

Voice & speech

Real-time text-to-speech, speech-to-text and managed voice agents through a usage-based API.

Free accessFree plan20000 credits/month, 1 USD agent credit; Sonic ~27 min, Ink ~1h51; TTS 2, STT/agents 8/8 concurrent
Paid fromPro · 5 USD100000 credits/month, 5 USD agent credit; Sonic ~133 min, Ink ~9h16; TTS 3, STT/agents 12/12 concurrent
  • TTS, STT and managed voice agents with separate consumption types
  • Zero Data Retention only for Enterprise TTS/STT

Details Visit site (opens in a new tab)

Castmagic

Audio editing & restoration

Turn audio and video into transcripts, notes, content and AI output for creator workflows.

Free accessNo free plan publishedNo Free plan publicly listed
Paid fromHobby · 1930 transcription hours total (library-wide allowance); 10 GB storage; 1 included seats; multilingual transcription, AI outputs, Magic Chat and …
  • Transcription time as pricing dimension rather than blanket AI outputs
  • 30 transcription hours total (library-wide allowance); 10 GB storage; 1 included seats; multilingual transcription, AI outputs, Magic Chat and custom prompts

Details Visit site (opens in a new tab)

Cleanvoice

Audio editing & restoration

Automatically clean audio and video podcasts of filler words, noise, silences, and mouth sounds.

Free accessFree trial
Paid fromPay as You Go 5h · $115 hours of processed audio
  • Test 30 minutes free
  • One-time credits for 5, 10, or 30 hours

Details Visit site (opens in a new tab)

Deepgram

Voice & speech

Developer API platform for speech-to-text, text-to-speech, and voice agents, billed on a usage basis.

Free accessFree plan
Paid fromPay As You Go · contact sales$200 free credit, no minimums
  • Real-time transcription (Nova-3) with the lowest latency for live applications
  • Batch transcription for recorded audio and video files

Details Visit site (opens in a new tab)

ElevenLabs

Voice & speech

Generate speech, voiceovers, dubbing, and voice agents with synthetic voices.

Free accessFree plan10,000 credits/month; the pricing table lists about 10 UI TTS minutes.
Paid fromStarter · $6 / $530,000 credits
  • Text-to-speech (TTS) with expressive voices in 70+ languages via web and API
  • Instant Voice Cloning and Professional Voice Cloning from short audio samples

Details Visit site. Advertising link: we receive a commission if you subscribe. The price is the same for you. (opens in a new tab)

Fish Audio

Voice & speech

AI text-to-speech and voice-cloning platform (plus speech-to-text and voice changer) positioned as a cheaper alternative to ElevenLabs.

Free accessFree plan
Paid fromPlus · 15 $250,000 credits/month; up to 200 generation minutes; unlimited public and 10 private voice slots
  • Text-to-speech and voice tools
  • Voice features per the product offering

Details Visit site (opens in a new tab)

G

Google Flow Music

Music generation

Build, remix, and turn songs into music videos with Veo using an AI co-producer built on Lyria 3.5; free to start with a Google account.

Free accessnot publishedDaily credits free with a Google account, no dedicated Flow Music price.
Paid fromGoogle AI subscription · Not verified for this marketMore daily quota via Google AI Plus, Pro, or Ultra
  • Chat-based AI co-producer that builds songs with rich musicality and dynamic vocals on top of Lyria 3.5
  • Direct remixing of existing tracks, with stem splitting and audio effects controllable in chat

Details Visit site (opens in a new tab)

HappyScribe

Audio editing & restoration

AI transcription and subtitling platform with a meeting notetaker, automatic speech recognition in 60+ languages, translation and optional human proofreading.

Free accessFree plan
Paid fromBasic · 8,50 Euro / 17 Euro1,440 AI minutes/year
  • Automatic speech recognition in over 60 languages for transcription and subtitles
  • Bot-free meeting recorder with real-time transcription and unlimited recording duration

Details Visit site (opens in a new tab)

Kits.ai

Voice & speech

Convert and clone singing voices.

Free accessFree plan15 conversion minutes but 0 download minutes.
Paid fromStarter · $10Unlimited conversions subject to fair use
  • Convert singing voices (voice conversion)
  • Clone your own voice for vocal production

Details Visit site (opens in a new tab)

Krisp

Audio editing & restoration

Transcribe meetings, remove noise, and convert accents.

Free accessFree trial7 days of core premium features without a card.
Paid fromCore · $16 / $8Unlimited notetaker, transcription, audio/video recording, and AI notes
  • Bot-free meeting notes and summary without a conference tool bot in the call
  • Noise and echo cancellation for microphone and speaker without internet connection required

Details Visit site (opens in a new tab)

LALAL.AI

Audio editing & restoration

Separate vocals, instruments, and noise from audio or video.

Free accessOne-off free allowance10 relaxed minutes for testing; no downloads.
Paid fromLite · $9090 fast minutes/month
  • AI stem separation for vocals, drums, bass, piano, guitars, and other sources
  • VST plugin for local processing directly in the digital audio workstation

Details Visit site (opens in a new tab)

L

Loudly

Music generation

Generate royalty-free songs with the VEGA and MANTA models and release them via built-in distribution to 50+ platforms.

Free accessnot published0.5-minute previews only, 1 download per day, non-commercial.
Paid fromPersonal · 10 USDAbout 2,500 credits per month
  • Two generation models: VEGA for fast drafts, MANTA for release-ready tracks
  • songDNA analyses the audio profile of a generated track

Details Visit site (opens in a new tab)

L

Lyria

Music generation

Google DeepMind's music model for full songs with vocals, accessed via the Gemini API, Vertex AI, or embedded in Google Flow Music.

Free accessnot publishedNo free tier in the Gemini API; free end-user access only through Google Flow Music with a Google account.
Paid fromGemini API - Lyria 3 Clip Preview · 0.04 USD30-second clip per call
  • Full songs with multilingual vocals, verse-chorus structure, and song length up to several minutes (Lyria 3.5)
  • Image-to-music: upload an image and have it turned into a matching track

Details Visit site (opens in a new tab)

M

MelodyCraft

Music generation

Turn lyrics or a prompt into complete songs with vocals across 70+ styles, including AI voice covers; add-on credit packs never expire.

Free accessnot publishedNo standalone free ongoing tier documented; entry via the one-time $9.90 starter pack.
Paid fromBasic · 9.90 USD150 credits per month, non-cumulative
  • 21 tools for song, cover, and lyrics creation in one interface
  • Songs from lyrics or a text prompt in over 70 music styles, including style mixes

Details Visit site (opens in a new tab)

M

Mubert

Music generation

Generative, royalty-free music as an API for apps, games, and livestreams; Content ID registration and streaming distribution are banned on every tier.

Free accessnot publishedNo free API tier; the cheapest entry point is the discounted Trial at $49/month.
Paid fromTrial · 49 USD100 generated tracks or streaming minutes per month
  • Text-to-music, image-to-music, BPM-based, and activity-based generation
  • WebRTC streaming with sub-second latency for live adaptation

Details Visit site (opens in a new tab)

M

Mureka

Music generation

Generate songs, instrumentals, and speech from text, a reference track, or humming, with stem separation and DAW control on the Premier plan.

Free accessnot published4 songs per day for free, shared queue.
Paid fromPro · 10 USD5,000 Gold per month
  • Mureka Co controls a DAW and local files through natural language (Premier only)
  • Stem separation from any existing song into up to 12 tracks

Details Visit site (opens in a new tab)

Murf AI

Voice & speech

Create voiceovers with many voices, languages, and a studio editor.

Free accessOne-off free allowance10 one-time voice-generation minutes; no downloads.
Paid fromCreator (annual billing) · $192 voice-generation hours on monthly billing or 24 hours/year
  • Script-based voiceovers in Studio; Murf Dub as a separate product
  • Script controls for speed, pitch, pauses, pronunciation, and emphasis

Details Visit site. Advertising link: we receive a commission if you subscribe. The price is the same for you. (opens in a new tab)

M

Musely

Music generation

Generate songs, videos, and images from one shared credit pool, with separate controls for lyrics, genre, mood, and BPM.

Free accessOne-off free allowance10 one-time credits, no refresh, personal use only.
Paid fromBasic · 19.90 USD500 credits per month
  • Separate controls for lyrics, genre, mood, BPM, and vocal gender instead of one bundled prompt
  • One credit pool covers music, video, and image generation together

Details Visit site (opens in a new tab)

M

Musicfy

Music generation

Turn your own or cloned voices into AI covers and songs; commercial licence starts at Professional.

Free accessnot publishedFree entry point without custom voice cloning; quota not consistently documented on the official page.
Paid fromStarter · 8 USD150 songs per month
  • Over 100,000 pre-built AI voice models by genre and character
  • Custom voice cloning from uploaded audio, up to 30 models on the Studio plan

Details Visit site (opens in a new tab)

ParaSpeech

Voice & speech

Mac-native dictation app that turns speech into text directly in any field via a keyboard shortcut, with optional on-device processing.

Free accessFree trial
Paid fromMonthly · 14,99 $Unlimited transcriptions
  • Turn spoken messages and notes into text
  • Mac and iPhone, with access across your own devices

Details Visit site (opens in a new tab)

Picovoice

Voice & speech

On-device AI SDKs for wake word detection, speech-to-text, text-to-speech, speaker recognition and more that run entirely on-device instead of in the cloud; free trial available, paid use only on request.

Free accessFree trial
Paid fromEnterprise / production · contact salesThe vendor describes a subscription model for enterprises including support, updates, upgrades and usage tracking; the official page names no …
  • On-device SDKs for wake word detection, speech-to-text, text-to-speech, and speaker recognition
  • Runs entirely on-device without cloud connectivity

Details Visit site (opens in a new tab)

Podigee

Audio editing & restoration

German podcast hosting platform with distribution, analytics and monetization, extended since 2024/25 with AI credits for automatic transcription, shownotes and social copy.

Free accessFree plan
Paid fromStarter · 19 € / 210 €1 podcast, unlimited audio
  • Podcast hosting with automatic AI transcription in 30+ languages
  • Chapter markers and automatic show note generation via AI

Details Visit site (opens in a new tab)

Resemble AI

Deepfake detection & authenticity

Detect deepfakes in audio, images, and video, protect identities, and watermark media.

Free accessFree plan$0 base fee; buy non-expiring credits; one seat.
Paid fromTeam · $350 / $280Five seats
  • Deepfake detection across audio, images, and video
  • C2PA watermarking and identity protection

Details Visit site (opens in a new tab)

Rev

Audio editing & restoration

US platform for AI and human transcription, captions and translation, since its relaunch primarily aimed at legal and investigative teams, with classic transcription/captioning still a core offering.

Free accessFree plan
Paid fromEssentials · 25,49 $ / 29,99 $5,000 AI transcription/caption minutes per seat per month (English & Spanish)
  • Speech to text, captions, and translation, by AI or humans
  • Aimed at legal and investigative teams; classic captioning remains core

Details Visit site (opens in a new tab)

Sarvam

Voice & speech

Indian AI API platform for text-to-speech, speech-to-text, translation, document AI, and multilingual chat models focused on Indian languages.

Free accessFree plan
Paid fromSarvam · TTS 3,00 Rupien pro 1.000 Zeichen; weitere Preise siehe Anbieter-WebsiteCovers TTS, STT, translation, document AI, dubbing and LLM chat under one API
  • Text-to-speech (TTS) for Indian languages at 3.00 rupees per 1,000 characters
  • Speech-to-text (STT) from 30 rupees per hour for transcription of Indian languages

Details Visit site (opens in a new tab)

Smallest.ai

Voice & speech

Voice AI platform offering low-latency (sub-100ms) text-to-speech, speech-to-text, and voice agents for enterprises.

Free accessFree plan
Paid fromEnterprise · contact sales99.99% SLA, on-premise, SSO, SOC2/HIPAA
  • Text-to-speech API with latency below 100 milliseconds for real-time voice applications
  • Speech-to-text transcription for conversations and recordings

Details Visit site (opens in a new tab)

Soundful

Music generation

Generate, download, and license instrumental tracks and loops by plan.

Free accessFree planUnlimited generation, 1 MP3 download/month, personal licence, and attribution.
Paid fromPlus · 9,99 $ pro Monat bei monatlicher Zahlung, 4,99 $ pro Monat bei jährlicher ZahlungUnlimited generations
  • Generate instrumental tracks and loop packages across various genres with one click
  • Every generated track is unique and licensed for commercial use

Details Visit site (opens in a new tab)

SOUNDRAW

Music generation

Generate and license instrumental music for content or original releases.

Free accessFree planGeneration and preview available; no licensed file download without a subscription.
Paid fromCreator · 5,83 € pro Monat bei JahreszahlungUnlimited track downloads/month
  • Generate instrumental music in a custom length and mood
  • Tempo-wise remix and arrangement adjustable in the editor

Details Visit site (opens in a new tab)

S

Soundverse

Music generation

Agentic AI music producer for songs, voice cloning, and stem separation; at least 1,000 free credits, Creator and Pro pricing is currently unpublished.

Free accessOne-off free allowance1,000 tokens on signup, non-commercial.
Paid fromCreator · Not verified for this marketPer the official page: unlimited generations, studio multitrack access, stems export, commercial licences
  • Agentic music assistant "Agent One" drives prompt-to-song generation, voice cloning, and iteration in dialogue
  • Stem separation and an Extend tool for lengthening existing tracks or loops

Details Visit site (opens in a new tab)

Speechify Studio

Voice & speech

Voiceover, dubbing, and avatars with one shared credit balance.

Free accessFree plan600 credits = 10 voiceover minutes; no commercial rights or downloads.
Paid fromStudio Starter · $10086,400 credits
  • Manage voiceover, dubbing, and avatar generation with a shared credit account
  • Over 200 AI voices and clone voices in 50+ languages with emotional expression

Details Visit site (opens in a new tab)

S

Stable Audio

Music generation

Generate music and sound effects with Stable Audio 3.0, via web app, DAW plugin, or API, with audio-to-audio editing and stem export.

Free accessNo free plan publishedNo free tier; the cheapest entry point is Solo at $12/month.
Paid fromSolo · 12 USD660 credits per month
  • Stable Audio 3.0 (May 2026) trained on fully licensed data for commercially safe use
  • Web app with conversational control, audio-to-audio editing, and inpainting

Details Visit site (opens in a new tab)

Suno

Music generation

Generate complete songs with vocals, instruments, and lyrics from text prompts.

Free accessFree plan50 credits daily; the pricing page says up to 10 songs, without commercial use.
Paid fromPro · $10 / $82,500 credits/mo (up to 500 songs)
  • Generate complete songs with vocals and instruments from a text prompt
  • Custom Mode: your own lyrics input and style tags for music genres

Details Visit site (opens in a new tab)

Superwhisper

Voice & speech

AI-powered dictation for macOS, Windows and iOS, works offline with local Whisper models and optionally with cloud/bring-your-own AI models.

Free accessFree plan
Paid fromPro · 8,49 $Everything in Free
  • AI speech recognition for macOS, Windows, and iOS with offline support for privacy
  • Dictation mode, transcription mode, and AI memo creation in one app

Details Visit site (opens in a new tab)

T

Treblo

Music generation

Generate free songs with an Advanced Mode for lyrics, style, and duration; only the developer API is billed by credits.

Free accessnot publishedConsumer app unlimited and free with no watermark; only the API costs money.
Paid fromAPI Starter · 11 USD20,000 credits per month, about 200 songs
  • Advanced Mode with a style-strength slider, rhythm assist, duration control, and free-form lyrics/tag input
  • Consumer app unlimited and free, no watermark, with full commercial rights to the output

Details Visit site (opens in a new tab)

Udio

Music generation

Generate, extend, and edit songs.

Free accessFree plan10 daily plus 100 monthly credits; maximum three long songs per day.
Paid fromStandard · 10 $ / Mo2,400 credits/month
  • Song generation from text with extend, remix, and inpaint functions
  • 32-second song costs 1 credit; 130-second song costs 2 credits

Details Visit site (opens in a new tab)

Vapi

Voice & speech

Developer platform for building and deploying voice AI agents (phone call bots) that handle customer calls, support, and appointment scheduling.

Free accessFree plan
Paid fromScale · contact salesVolume-based per-minute pricing, SOC 2, HIPAA, PCI, SSO
  • Pay-as-you-go call minutes from $0.05 per minute
  • 10 concurrent calls included at no extra cost in the Build plan

Details Visit site (opens in a new tab)

V

Veena

Music generation

Browser-based DAW with an AI CoProducer that builds songs as editable MIDI instead of a finished audio file, including stem splitting and VST/AU hosting.

Free accessnot published5 CoProducer requests per day for free, without premium models.
Paid fromPro · 20 USD20,000 credits per month
  • AI CoProducer builds songs layer by layer as editable MIDI: drums, bass, chords, melody, effects
  • Imported audio tracks are split into real stems on the timeline

Details Visit site (opens in a new tab)

Voice.ai

Voice & speech

TTS, voice agents, and audio tools.

Free accessFree plan5,000 credits: 5 TTS minutes or 3 audio-tool uses.
Paid fromStarter · $5 / $4.1715,000 credits/month
  • Text-to-speech and voice agents in a shared credit system
  • Instant voice cloning from the Starter plan

Details Visit site (opens in a new tab)

Wispr Flow

Voice & speech

System-wide AI dictation app that turns spoken speech into polished, ready-to-use text in any application on Mac, Windows, iOS, and Android.

Free accessFree plan
Paid fromPro · 12 € pro Monat bei jährlicher Zahlung (15 € bei monatlicher Zahlung)Unlimited dictation
  • System-wide AI dictation in any app on Mac, Windows, iOS, and Android
  • Unlimited dictation with advanced AI models from Pro

Details Visit site (opens in a new tab)

Alphabetical order. This is not a quality ranking.

Comparison criteria

We compare free access, paid entry, plan limits, features and the listed official sources. Unsourced figures stay marked as not published.

Methodology

Only confirmed entries appear in the catalog. Prices, plans and limits come from listed official vendor pages. Missing figures stay marked as not published. Result lists are alphabetical by default and can be switched to Free access first; neither is a quality ranking. The vendor page always wins.

Is this a ranking?

No. Result lists are alphabetical by default and can be switched to Free access first. We do not award stars or a test winner.

Do you estimate missing prices?

No. Missing figures stay marked as not published. The current vendor page always wins.

How do you sort the tools?

Result lists are alphabetical by default and can be switched to Free access first. This is not a quality ranking.