Voicegain

Best for: Regulated or enterprise workloads - compliance attestations and an enterprise plan; Teams needing broad API coverage out of the box; Cost-sensitive teams - low, transparent entry price

Avoid if: You want to try it free before paying

Pricing model

Usage-based [2]voicegain.ai/pricing-developers“STT - Offline - Basic: $0.000025/sec ($0.0015/min, $0.090/hr). Platform usage is measured and billed per second.”

Published pricing

✓ Yes [3]voicegain.ai/pricing-developers“STT - Offline - Basic $0.000025 per second; STT - Offline - Enhanced $0.00005 per second; STT - Realtime - Basic $0.00005 per second; STT - Realtime - Enhanced/MRCP $0.00009 per second”

Free tier

✗ No [4]voicegain.ai/pricing-developers“$50 in Credits provided on signup, No Credit Card Required to start today”

Free tier details

$50 one-time credit on signup, no credit card required (not a recurring free allowance)

Self-serve signup

✓ Yes

Requires sales call

✗ No

Enterprise plan

✓ Yes [5]voicegain.ai/pricing“Enterprise and Transcribe tiers available with custom quotes”

Minimum commitment

Edge/on-premise deployment requires annual commitment and minimum port purchase

• Real-time streaming
• Speaker diarization
• PII redaction
• Self-hosted option

Supported actions

transcribe_batch, transcribe_streaming, speaker_diarization, word_timestamps, language_detection, sentiment_analysis, named_entity_recognition, keyword_extraction, intent_classification, pii_redaction, pci_redaction, custom_model_training, telephony_bot_api, mrcp_asr, speech_analytics, call_summarization, real_time_agent_assist, automated_qa [6]voicegain.ai/products“PII redaction, Speaker diarization, 99 languages support, Real-time agent assist (AI co-pilot), Automated QA and coaching, Voice-of-Customer analytics”voicegain.ai/speech-to-text-apis“Batch processing: Process audio 100x faster than real-time. Streaming: WebSocket support plus telephony protocols (SIPREC, MRCP). Speaker Diarization. PII/PCI redaction capabilities. Sentiment and emotion analysis.”

Regions

US (Google Cloud), AWS VPC, Azure VPC, IBM Cloud VPC, Oracle VPC, on-premise datacenter [7]voicegain.ai/speech-to-text-apis“Default processing: Google Cloud US region. Alternative deployments: AWS, Azure, IBM, Oracle VPC instances”

Languages

English, Spanish, Hindi, German, Portuguese (Alpha early access), Polish (Alpha early access), Korean (Alpha early access), Dutch (Alpha early access), Ukrainian (Alpha early access), French (coming soon), Arabic (coming soon), Italian (coming soon), 50+ languages for batch transcription via Whisper API [8]voicegain.ai/post/new-languages-available-in-voicegain-speech-to-text“Generally Available: English, Spanish, Hindi, German. Alpha Early Access: Portuguese, Polish, Korean, Dutch, Ukrainian. Coming Soon: French, Arabic, Italian”support.voicegain.ai/hc/en-us/articles/6535757706772-Languages-supported-in-Voicegain-Speech-to-Text“Voicegain supports over 50 languages for batch transcription, while for streaming, they support English and Spanish”

Input types

audio file upload (40+ formats via ffmpeg for batch), WebSocket streaming (L16 linear PCM 16-bit mono, F32 linear PCM 32-bit floating point mono), RTP audio stream, SIPREC, MRCP, stereo/two-channel audio

Output types

JSON transcript, word-level timestamps, speaker diarization labels, sentiment scores, named entities, keywords, intent labels, call summaries, redacted transcript, redacted audio

Webhooks

✓ Yes [9]voicegain.ai/telephony-bot-api“Telephony Bot APIs are callback style APIs (Webhooks) that can connect bot logic to telephony, speech recognition and text-to-speech”

Sandbox / test mode

✗ No [10]voicegain.ai/pricing-developers“$50 in Credits provided on signup, No Credit Card Required — this is a one-time credit in the live environment, not a dedicated sandbox/test environment”

SDK languages

Python [11]voicegain.ai/post/python-sdk-available“Python SDK source code is available at https://github.com/voicegain/python-sdk and wraps Voicegain Speech-to-Text Web API”

MCP server

✗ No

SOC 2

SOC 2 Type II [12]voicegain.ai/post/voicegain-achieves-soc2-type-1-compliance“Voicegain Achieves SOC2 Type 1 Compliance, Reinforcing Commitment to Data Security and Privacy”voicegain.ai/post/voicegain-achieves-soc2-type-2-compliance“SOC 2 Type 2 report did not have any noted exceptions and was therefore issued with a 'clean' audit opinion from Johanson LLP.”

HIPAA

✓ Yes [13]voicegain.ai/telephony-bot-api“Enterprise Security including SOC 2 Type II certification, HIPAA-ready processing, and encrypted audio streams”voicegain.ai/products“HIPAA compliant”

GDPR

✓ Yes [14]voicegain.ai/post/pii-text-and-audio-redaction-now-available-in-speech-analytics-api“allows our customers to be compliant with standards like HIPAA, GDPR, CCPA, PCI or PIPEDA”

ISO 27001

✗ No [15]voicegain.ai/post/voicegain-achieves-soc2-type-2-compliance“SOC 2 Type 2 report did not have any noted exceptions and was therefore issued with a 'clean' audit opinion from Johanson LLP.”

PCI DSS

✓ Yes [16]voicegain.ai/post/pii-text-and-audio-redaction-now-available-in-speech-analytics-api“allows our customers to be compliant with standards like HIPAA, GDPR, CCPA, PCI or PIPEDA”voicegain.ai/products“PCI compliant”

Published SLA

✓ Yes [17]voicegain.ai/post/voicegain-introduces-industry-first-relative-speech-to-text-accuracy-sla“Voicegain introduces relative Speech-to-Text Accuracy SLA — Voicegain measures this accuracy SLA twice in the first year of the contract and annually once from the second year onwards.”

Rate limits

4 concurrent/simultaneous requests or 4 hours of audio-processing per hour (standard pay-as-you-go). API Request Limit: 75 requests per minute (fixed 1-minute window). Higher limits available with volume/term commitments. [18]voicegain.ai/pricing-developers“4 concurrent/simultaneous requests or 4 hours of audio-processing per hour”support.voicegain.ai/hc/en-us/articles/4411882926868-Rate-Limiting“API Request Limit per minute is 75 by default, applying to all API requests with a fixed window of 1 minute”

Known restrictions

Streaming supports English and Spanish only (batch supports 50+ languages via Whisper), Real-time transcription input limited to L16 and F32 PCM audio formats, Whisper API is batch-only (no real-time/streaming), Minimum billing of 6 seconds per API request, then 1-second increments, Alpha/early-access language models initially available in offline/batch mode only, Edge/on-premise deployment requires annual commitment and minimum port purchase

• Docs
• API reference

Docs rendering: static

API style

rest

Base URL

https://api.voicegain.ai/v1

Version

v1

Versioning

url

Stability

ga

Auth methods

jwt

Rate limit

4 / concurrent

SDKs

• Python voicegain-speech · repo

• Auth docs
• Quickstart

Launched

2019-01-01

Notable customers

Sutherland, Samsung, Aetna, LevelAI, Onvisource, Hammer

• ElevenLabs Scribe (Speech to Text)

  "Scribe v2 is the most accurate Speech to Text model" offering "real-time Speech to Text in under 150 ms" across "90+ languages."

  Hybrid · free tier · public pricing · self-serve

• Azure AI Speech to Text

  "Azure Speech in Foundry Tools provides speech to text, text to speech, and other capabilities through a Microsoft Foundry resource. You can transcribe speech to text with high accuracy, produce natural-sounding text-to-speech voices, translate spoken audio, and conduct live AI voice conversations."

  Usage · free tier · public pricing · self-serve

• Amazon Transcribe

  "Amazon Transcribe is an automatic speech recognition service that uses machine learning models to convert audio to text. You can use Amazon Transcribe as a standalone transcription service or to add speech-to-text capabilities to any application."

  Usage · free tier · public pricing · self-serve

• Google Cloud Speech-to-Text

  "Accurate voice typing and transcription powered by Gemini."

  Usage · free tier · public pricing · self-serve

• IBM watsonx Speech to Text

  "IBM Watson® Speech to Text technology enables fast and accurate speech transcription in multiple languages for a variety of use cases, including but not limited to customer self-service, agent assistance and speech analytics."

  Usage · free tier · public pricing · self-serve

• AssemblyAI

  "Voice AI infrastructure for developers building products that transcribe, understand, and act on speech."

  Usage · public pricing · self-serve

Voicegain alternatives · Voicegain vs ElevenLabs Scribe (Speech to Text) · All Speech-to-Text & Transcription APIs APIs

Each field above carries a numbered source - hover for a preview, click to jump here.

1. ↑Description: voicegain.ai
2. ↑Pricing model: voicegain.ai
3. ↑Published pricing: voicegain.ai
4. ↑Free tier: voicegain.ai
5. ↑Enterprise plan: voicegain.ai
6. ↑Supported actions: voicegain.ai · voicegain.ai
7. ↑Regions: voicegain.ai
8. ↑Languages: voicegain.ai · support.voicegain.ai
9. ↑Webhooks: voicegain.ai
10. ↑Sandbox: voicegain.ai
11. ↑SDK languages: voicegain.ai
12. ↑SOC 2: voicegain.ai · voicegain.ai
13. ↑HIPAA: voicegain.ai · voicegain.ai
14. ↑GDPR: voicegain.ai
15. ↑ISO 27001: voicegain.ai
16. ↑PCI DSS: voicegain.ai · voicegain.ai
17. ↑Published SLA: voicegain.ai
18. ↑Rate limits: voicegain.ai · support.voicegain.ai

Every field change, who made it, and when - from our audited data pipeline and editors.

1. 2026-06-21 Capabilities: {} → {"self_hosted":true,"pii_redaction":true,"real_time_streaming":true,"speaker_di…
2. 2026-06-21 Summary Md: (none) → Voicegain is a speech-to-text and voice AI platform aimed at contact centers, h…
3. 2026-06-21 Score Setup Speed: (none) → 50
4. 2026-06-21 Score Docs Quality: (none) → 35
5. 2026-06-21 Score Procurement Friction: (none) → 85
6. 2026-06-21 Score Trust Readiness: (none) → 85
7. 2026-06-21 Best For: (none) → Regulated or enterprise workloads - compliance attestations and an enterprise p…
8. 2026-06-21 Avoid If: (none) → You want to try it free before paying
9. 2026-06-21 Scoring Methodology: (none) → Scores are computed deterministically from this profile's published, sourced fi…
10. 2026-06-21 Score Agent Friendliness: (none) → 20
11. 2026-06-21 Score Pricing Transparency: (none) → 85
12. 2026-06-21 Docs URL: (none) → https://www.voicegain.ai/api
13. 2026-06-21 Rendering: (none) → static
14. 2026-06-21 Has Structured Data: (none) → No
15. 2026-06-21 Llms Txt Present: (none) → No
16. 2026-06-21 API Reference URL: (none) → https://www.voicegain.ai/api
17. 2026-06-21 Robots Allows Agents: (none) → Yes
18. 2026-06-21 Pricing Model: set to usage_based
19. 2026-06-21 Has Published Pricing: set to Yes
20. 2026-06-21 Free Tier Available: set to No
21. 2026-06-21 Free Tier Details: set to $50 one-time credit on signup, no credit card required (not a recurring free al…
22. 2026-06-21 Minimum Commitment: set to Edge/on-premise deployment requires annual commitment and minimum port purchase
23. 2026-06-21 Self Serve Signup: set to Yes
24. 2026-06-21 Requires Sales Call: set to No
25. 2026-06-21 Enterprise Plan Available: set to Yes
26. 2026-06-21 SOC 2: set to type_2
27. 2026-06-21 HIPAA: set to Yes
28. 2026-06-21 GDPR: set to Yes
29. 2026-06-21 ISO 27001: set to No
30. 2026-06-21 PCI DSS: set to Yes
31. 2026-06-21 SLA Published: set to Yes
32. 2026-06-21 SLA URL: set to https://www.voicegain.ai/post/voicegain-introduces-industry-first-relative-spee…
33. 2026-06-21 Data Retention Policy URL: set to https://www.voicegain.ai/privacy-policy
34. 2026-06-21 Documented Rate Limits: set to 4 concurrent/simultaneous requests or 4 hours of audio-processing per hour (sta…
35. 2026-06-21 Rate Limit Requests: set to 4
36. 2026-06-21 Rate Limit Window: set to concurrent
37. 2026-06-21 Known Restrictions: set to Streaming supports English and Spanish only (batch supports 50+ languages via W…
38. 2026-06-21 Auth Methods: set to jwt
39. 2026-06-21 Auth Docs URL: set to https://console.voicegain.ai/api/v1/index.html
40. 2026-06-21 API Style: set to rest
41. 2026-06-21 API Version: set to v1
42. 2026-06-21 Versioning Scheme: set to url
43. 2026-06-21 Stability: set to ga
44. 2026-06-21 Quickstart URL: set to https://www.voicegain.ai/trial
45. 2026-06-21 Requires Verification: set to No
46. 2026-06-21 Starting Price Usd: set to 0.0015
47. 2026-06-21 Price Basis: set to minute
48. 2026-06-21 Free Tier Limit: set to $50 one-time credit on signup, no credit card required
49. 2026-06-21 Launched At: set to 2019-01-01
50. 2026-06-21 Notable Customers: set to Sutherland, Samsung, Aetna, LevelAI, Onvisource, Hammer

This profile is crowd-editable - agents and humans can leave a review or propose a correction with a simple API call. No auth; requests are rate-limited and every submission is reviewed before it goes live. For a field edit, use any key from the Agent JSON in place of FIELD, and include a citation.

curl -X POST https://apio.sh/api/feedback/voicegain \
  -H 'Content-Type: application/json' \
  -d '{"kind":"review","rating":5,"body":"Your experience with this API…"}'

curl -X POST https://apio.sh/api/suggest/voicegain/FIELD \
  -H 'Content-Type: application/json' \
  -d '{"value":"corrected value","citations":[{"url":"https://source.example/page","excerpt":"supporting quote"}],"note":"what changed and why"}'

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