AssemblyAI
Based on public pricing signals, xpay verified that AssemblyAI publishes per-hour rates across STT, streaming, voice agent, and per-hour speech-understanding add-ons, with a $50 no-credit-card starting balance and a fully public docs site. The pricing page itself behaves like an API rate card, which is unusually well-suited to autonomous agent procurement.
Pricing built for innovation, not contract negotiation — $0.21/hr, no contracts, no minimums, no credit card required
$0.21/hr Universal-3 Pro STT; $0.15/hr Universal-Streaming; $4.50/hr Voice Agent
$0
Contact sales
How AssemblyAI scores on the 7 agent-ready dimensions
Public pricing
15 / 15
Usage-based / metered
22 / 25
Self-serve checkout
8 / 15
Public API
15 / 15
Low / no minimum
8 / 10
Unauth automated payment
6 / 10
Bonus (machine-readable pricing)On top of /100 base
0 / 5
Total
74 / 100
Six-step check: can an agent actually buy from AssemblyAI?
Discover price
https://www.assemblyai.com/pricing — per-hour rate tables across all productsSelect a plan
Pay-as-you-go vs Custom plans clearly distinguishedPay per task
$0.21/hr Universal-3 Pro per second of audio at https://www.assemblyai.com/pricingAvoid a sales call
PAYG fully self-serve via dashboard signup; only Custom is sales-ledAPI docs without auth
https://www.assemblyai.com/docs — publicEstimate cost upfront
Per-hour rate + multichannel formula disclosed in FAQ at https://www.assemblyai.com/pricingPros and cons for AI agents
Observational summary written by xpay from the signals captured on 2026-05-03. Not a review of the product — only of its current pricing posture for agent buyers.- Pricing is publicly visible on an indexable page — agents can read tiers without scraping past auth.
- Per-unit billing is published, so an agent can budget for a single task before committing.
- API documentation is reachable without a login — discovery and integration can happen in one session.
- Per-unit rate is concrete enough that an agent can model expected spend before issuing a request.
- A free tier exists, lowering the bar for an agent builder to prototype before committing budget.
- Some tiers are sales-led; the highest-capacity surfaces are not self-serve.
- PPU requires account creation and an issued API key; a fully unauthenticated agent purchase is not yet supported.
- No /.well-known/ai-pricing.json or equivalent machine-readable pricing manifest is published — agents must rely on HTML scraping.
How AssemblyAI could lift its score
AssemblyAI is already Verified. Two missing points: (1) publish /.well-known/ai-pricing.json so agents can ingest the rate card without HTML parsing; (2) support an anonymous one-shot PPU purchase via xpay widget. Both lift to 100/100.
| pricing_visible | true |
| headline_phrasing | Pricing built for innovation, not contract negotiation — $0.21/hr, no contracts, no minimums, no credit card required |
| tier_count | 2 |
| lowest_paid_entry_usd | 0 |
| free_tier | true |
| free_tier_terms | $50 credit, no credit card |
| per_unit_price | $0.21/hr Universal-3 Pro STT; $0.15/hr Universal-Streaming; $4.50/hr Voice Agent |
| annual_required | false |
| self_serve_paid_tiers | 1 |
| sales_only_tiers | 1 |
| public_api_docs_url | https://www.assemblyai.com/docs |
| api_docs_auth_walled | false |
| ai_pricing_json_present | false |
| agents_txt_present | false |
| anonymous_purchase_path | false |
AssemblyAI
74
/ 100 (rubric v1.1)Speech & Transcription
Pricing built for innovation, not contract negotiation — $0.21/hr, no contracts, no minimums, no credit card required
2
Yes
$50 credit, no credit card
Free
$0.21/hr Universal-3 Pro STT; $0.15/hr Universal-Streaming; $4.50/hr Voice Agent
1 / 1
Public
No
Not published
2026-05-03