Free-offer comparison
Free AI Audio APIs
This category includes several audio tasks, including transcription. Check which endpoint the free offer covers before treating it as an audio-generation allowance.
Guide updated Sep 20, 2026 · Offer review and source dates appear below · Methodology
Free-offer ranking
Each row describes the provider’s recorded free offer, which may cover a different product from the category shown here. The table keeps published units separate. “Not confirmed” means we lack evidence for that detail; it does not mean the provider requires a card.
Scroll horizontally to compare every column.
| Rank | Provider | Free-access score | Recorded free offer | Access pattern | Billing/card | Offer note | Full review | Official source |
|---|---|---|---|---|---|---|---|---|
| #1 | Deepgram | 85/100 | $200 credit | One-time balance | No card confirmed | Current concurrency is up to 50 REST and 150 WebSocket STT connections. | Sep 19, 2026 | View pricingAccessed Sep 19, 2026 |
| #2 | Cloudflare Workers AI | 75/100 | 10K neurons/day | Recurring allowance | Not confirmed | 10,000 neurons per day reset at 00:00 UTC. | Jul 17, 2026 | View documentationAccessed Sep 13, 2026 |
| #3 | Google Cloud Speech-to-Text | 75/100 | 60 minutes/mo | Recurring allowance | Not confirmed | The general Google Cloud new-customer credit is separate. | Jul 17, 2026 | View pricingAccessed Sep 13, 2026 |
| #4 | IBM Watson Speech-to-Text | 75/100 | 500 minutes/mo | Recurring allowance | Not confirmed | Lite instances are deleted after 30 days of inactivity. | Sep 13, 2026 | View pricingAccessed Sep 13, 2026 |
| #5 | Amazon Transcribe | 75/100 | 60 minutes/mo for 12 months | Introductory quota | Not confirmed | The 60-minute monthly allowance lasts for 12 months starting with the first transcription request. | Jul 17, 2026 | View pricingAccessed Sep 13, 2026 |
| #6 | Stability AI Developer Platform | 65/100 | 25 credits | One-time balance | Not confirmed | API operations consume different numbers of credits. | Jul 17, 2026 | View documentationAccessed Sep 13, 2026 |
| #7 | AssemblyAI | 50/100 | $50 credit | One-time balance | Not confirmed | $50 one-time signup credit with no card; five new streaming sessions per minute. | Jul 17, 2026 | View pricingAccessed Sep 20, 2026 |
| #8 | xAI (Grok) | 30/100 | Free tier | Free offer recorded | Not confirmed | Free Grok plan includes limited access to real-time web and X search, voice mode, and connectors | Jun 24, 2026 | View documentationAccessed Sep 13, 2026 |
Why these providers appear in this order
We score each provider’s recorded free offer: up to 40 points for recurring or durable access, 20 for a confirmed no-card signup, 15 for a stated allowance, 15 for distinct evidence links, and 10 for documented terms. Missing details earn no points. Ties favor longer-lasting access, then more detailed records, then provider name. The score does not measure product quality or whether the free offer covers this category. Read the full method before treating it as a recommendation.
Which providers are included?
We include active directory records tagged for AI audio APIs. A tag describes a provider’s capability; its recorded free offer may cover only part of that provider’s catalog. Check the model or endpoint in the provider’s terms before building on the allowance.
See the full AI audio APIs category, including records excluded from this guide.