AssemblyAI
Production-grade Speech AI and voice intelligence cloud platform for developers (Universal series ASR, TTS, and diarization)
Product node overview & trust baseline
Operator provenance, privacy baseline and site-wide pricing belong directly to the product node and are inherited across linked task edgesAssemblyAI (founded in 2017, headquartered in San Francisco) is a leading speech AI company developing state-of-the-art foundation models like Universal-3.5 Pro and Universal-2 for asynchronous and streaming ASR, speaker diarization, TTS, and LLM-driven audio intelligence. Operating under a developer-centric pay-as-you-go and free tier model, new accounts receive free testing credits, followed by hourly billing ($0.15/hr for Universal-2, $0.21/hr for Universal-3.5 Pro) with zero upfront commitments.
San Francisco, California speech AI frontier company (founded in 2017 by Dylan Fox) · 2017–Present (9 years)
Provenance baseline: 19/20 · Core infrastructure speech AI provider with exceptional technical reputation, high transparency, and full enterprise security guarantees.
New accounts receive free testing credits (up to 185 hours pre-recorded audio, no credit card required); pay-as-you-go thereafter ($0.15/hr for Universal-2, $0.21/hr for Universal-3.5 Pro; $15/1M chars for TTS); zero minimum spend commitments.
Pricing transparency baseline: 34/35 · Cancellation:
Audio files are transcribed on demand with configurable Zero Data Retention (ZDR) policies for enterprise privacy
Google Analytics · Stripe Checkout
Product-level pricing & rules baseline
Verified plans, billing periods and cancellation terms owned by this product node; task-specific credit costs and free export limits are detailed per capability edge belowAssemblyAI sitewide speech-to-text, TTS, and audio intelligence APIs; free credits and pay-as-you-go · 2026-10-29
3 plan / billing-period records, all listed; — means that period is not recorded.
New accounts receive free testing credits (up to 185 hours pre-recorded audio, no credit card required); pay-as-you-go thereafter ($0.15/hr for Universal-2, $0.21/hr for Universal-3.5 Pro; $15/1M chars for TTS); zero minimum spend commitments.
Cancellation, sources & verification record
Cancellation and refund terms unverified
AssemblyAI official homepage ↗ · 2026-10-29 Capture 1 ↗
AssemblyAI official model pricing table ↗ · 2026-10-29 Capture 1 ↗
Archived official pricing sources: AssemblyAI official homepage (2026-10-29) [text snapshot ↗] · AssemblyAI official model pricing table (2026-10-29) [text snapshot ↗]
Capability map & linked task edges
Whenever a capability passes fixed-fixture testing, an edge is automatically linked between this product node and the task topic for horizontal comparison.
This product node has a verified operator, privacy, and pricing baseline, but currently has no scored task edges with a free native export. See the discovered capabilities or paywall-blocked test records below.
Discovered product capabilities (pending fixture test / edge incubation)
Recorded capability · Not yet scoredThese capabilities have been identified on the product but have not yet undergone fixed-fixture testing. When an emerging capability co-occurs across multiple products, it incubates a new task edge.
Universal model async and streaming real-time speech-to-text across 99 languages with word timestamps
High accuracy multispeaker diarization and conversational speaker turn segmentation
Tested task edges (with scores and native artifacts) are strictly separated from discovered untested capabilities (unscored).
Developer & citation kit · Claim updates, request benchmarks & embed verified badges
Product developers and writers can embed these SVG badges in official websites, GitHub READMEs or documentation, or use the channels below to sync product-wide plans and capabilities.
[](https://realtest.org/tools/assemblyai.com/) <a href="https://realtest.org/tools/assemblyai.com/"><img src="https://realtest.org/badges/assemblyai.com.svg" alt="AssemblyAI — RealTest" height="24" /></a>