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 per month. Free tokens are listed inconsistently: the plan card says 10,000, the comparison table says 1,000. Publication is allowed only for non-commercial use with attribution. Tokens do not roll over.
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
Real-time text-to-speech, speech-to-text and managed voice agents through a usage-based API.
Free accessFree plan20000 credits per month, plus 1 USD of agent credit, which covers about 27 minutes with Sonic or about 1 hour 51 minutes with Ink. Concurrency limits are 2 for text-to-speech (TTS) and 8 each for speech-to-text (STT) and agents.
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
Browser AI for short spoken producer tags, with voice choice, effects and download.
Free accessFree plan1 standard-voice tag per UTC day without login, plus 2 after sign-in, up to 3 from the same device or network. The free file is a 128kbps MP3.
Paid fromStarter · 9.90 USD300 credits, about 60 generated tags, at 5 credits per successful result.
Write a short line, choose a voice and effects, then preview and download in the browser
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 rupees per 1.000 characters; other prices on the vendor 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
AI dictation that turns speech into text, for Mac, Windows, and iPhone.
Free accessFree planBasic is 0 USD. Frontier Mini and 20 Scribe uses per week.
Paid fromPro · 15 USD15 USD per user per month when billed monthly. 12 USD per user per month when billed annually. The official provider page shows Save 20% and …
Basic is 0 USD, with 20 Scribe uses per week.
Pro is 15 USD per user per month, or 12 USD per user per month annually.
For these tools the vendor publishes neither free access nor a price (often on request only), or the product status is unclear. Also alphabetical, not a rating.
Core capabilities include: Convert text into synthesized speech; Design new voices from text descriptions; Use reference voices for speech synthesis.
Free accessnot publishedA free AI allowance is not clearly specified.
Paid fromAccess · Not verified for this marketDownload and self-hosting are documented. Model APIs, hardware and hosting may incur additional costs; separate licence conditions apply.
Alphabetical order. This is not a quality ranking. Tools with no published price or free access, or with an unclear status, follow in a second group, also alphabetical. Commissions have no influence on the order.
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. Search results are ordered by Task match by default; category and task lists are alphabetical. Both can be switched to Free access first; neither is a quality ranking. The vendor page always wins.
Is this a ranking?
No. Search results are ordered by Task match by default; category and task lists are alphabetical. Both can be switched to Free access first. We do not award stars or a test winner.
What does "free access" mean for the listed tools?
Free access can mean a permanently free plan, a time-limited trial, or a one-off starting credit with no card required. The exact type is stated on each tool's own page.
How many of the listed tools offer free access?
32 of 38 listed tools offer free access - a permanent plan, a trial, or a no-card credit.
How do I see tools with free access first?
Use the “Free access first” toggle above the list to see tools with free access first.
