Rime

Best for: Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt); Teams needing broad API coverage out of the box

Avoid if: You want to try it free before paying

Pricing model

Usage-based [2]rime.ai/pricing“STARTING AT $0.03 / 1K characters. 20 concurrent TTS generations.”rime.ai/resources/introducing-new-pricing“Rime uses usage-based pricing rather than fixed monthly costs. The Starter plan features 'No overages, usage stops when credits run out.'”

Published pricing

✓ Yes [3]rime.ai/pricing“Coda: $0.05 / 1k characters. Arcana: $0.04 / 1k characters. Mist: $0.03 / 1k characters.”

Free tier

✗ No [4]rime.ai/pricing“Get 3,000 minutes free”rime.ai/resources/introducing-new-pricing“$100 in free credits on signup, plus another $100 when you add a card”

Self-serve signup

✓ Yes [5]rime.ai/pricing“Starter: Get 3,000 minutes free. STARTING AT $0.03 / 1K characters.”

Requires sales call

✗ No

Enterprise plan

✓ Yes [6]rime.ai/pricing“Enterprise: Volume pricing for large organizations running at scale. Custom.”

Minimum commitment

Enterprise plan requires a minimum annual commitment (amount not published). [7]rime.ai/pricing“Enterprise plans are custom-built with a minimum annual commitment”

• Real-time streaming
• Voice cloning
• Multilingual voices
• Word timestamps

Supported actions

synthesize_speech, streaming_tts, websocket_tts, word_timestamps, professional_voice_cloning, regional_endpoints, on_premises_deployment, speed_adjustment, custom_pronunciation, multilingual_synthesis, server_sent_events_streaming [8]docs.rime.ai/api-reference/websocket“/ws3 streams audio as base64-encoded JSON chunks. Both JSON endpoints return timing data for individual words, enabling interrupt handling during speech playback.”docs.rime.ai/docs/models“Coda: Word-level timestamps, spell() function, text normalization, speed adjustment”

Regions

US West (us-west-2), US East (us-east-1), on-premises (customer-hosted), private VPC [9]docs.rime.ai/docs/regional-endpoints“US West (us-west-2) — Default region. US East (us-east-1). Route requests to the Rime region closest to your application's deployment, reducing network latency.”

Languages

English, Spanish, French, Portuguese (Coda, Arcana only), German, Japanese (Coda, Arcana only), Hebrew (Arcana only) [10]docs.rime.ai/voices“Rime supports 7 languages as of May 19, 2026: English, Spanish, French, Portuguese, German, Japanese, and Hebrew (Arcana only).”docs.rime.ai/docs/models“Coda supports English, Spanish, French, Portuguese, German, and Japanese using a shared voice lineup.”

Input types

plain text

Output types

audio/webm;codecs=opus, audio/ogg;codecs=opus, audio/mpeg (MP3), audio/wav (PCM 16-bit), audio/L16 (headerless PCM), audio/PCMU (G.711 μ-law), streaming chunks (WebSocket base64 JSON) [11]docs.rime.ai/api-reference/endpoint/tts“audio/webm;codecs=opus (recommended; excellent compression), audio/ogg;codecs=opus, audio/mpeg (highest device compatibility), audio/wav (uncompressed, 16-bit PCM, native browser streaming), audio/L16 (headerless PCM), audio/PCMU (G.711 μ-law)”

Webhooks

✗ No

Sandbox / test mode

✗ No [12]rime.ai/pricing“Starter (self-serve) plan uses the live environment. No dedicated sandbox or test-mode keys mentioned.”

SDK languages

CLI [13]docs.rime.ai/sdks“The documentation explicitly supports four language options: cURL, Python (Version 3.10 or later), JavaScript (Node.js 18 or later), TypeScript (Node.js 18+)”

MCP server

✗ No [14]github.com/MatthewDailey/rime-mcp“This is a third-party project, not an official Rime server. There is no indication of official affiliation with Rime.”

SOC 2

SOC 2 Type II [15]rime.ai/security“As of May 2025, we are SOC 2 Type 2 compliant.”

HIPAA

✓ Yes [16]rime.ai/pricing“BAA (HIPAA) and SOC 2 reports”rime.ai/security“As of February 2024, we are HIPPA compliant. Their most recent audit was completed in March 2026.”

GDPR

– Unknown [17]rime.ai/security“Data Processing Agreement (DPA) available. GDPR not explicitly claimed or denied on the security page.”

ISO 27001

– Unknown

PCI DSS

– Unknown

Published SLA

✗ No [18]rime.ai/pricing“SLAs + dedicated support”rime.ai/security“SLA terms: Not specified in content. No published SLA document found.”

Rate limits

Starter plan: 20 concurrent TTS generations. Enterprise plan: unlimited (expandable as needed). Per-request text limit: 3,000 characters. Model latency: Coda ~175ms TTFB; Mist sub-200ms cloud, sub-100ms on-prem. [19]rime.ai/pricing“20 concurrent TTS generations”docs.rime.ai/api-reference/endpoint/tts“text (required): Speech content; 3,000 character limit per request”

Known restrictions

3,000 character limit per HTTP request, SSML not supported, Starter plan service stops when credits deplete (no overage), Enterprise plan requires minimum annual commitment, Mist v3 is English-only, Mist v2 supports English and Spanish only, Hebrew support available on Arcana v3 only, Portuguese and Japanese available on Coda and Arcana only [20]docs.rime.ai/api-reference/endpoint/tts“text (required): Speech content; 3,000 character limit per request”docs.rime.ai/docs/models“Mist v3: English only. Mist v2: English + Spanish. The document contains no references to SSML”

• Docs
• API reference
• llms.txt
• Status page

Docs rendering: static · llms.txt present

API style

rest

Base URL

https://users.rime.ai/v1/rime-tts

Version

v1

Versioning

url

Stability

ga

Auth methods

api_key

Error format

vendor-specific

Rate limit

20 / concurrent

SDKs

• CLI rime

• Auth docs
• Quickstart

Launched

2022-01-01

Notable customers

ConverseNow, Domino's

• ElevenLabs Text to Speech

  "Text to Speech with high quality, human-like AI voices"

  Hybrid · free tier · public pricing · self-serve

• Azure AI Text to Speech

  "Text to speech enables your applications, tools, or devices to convert text into human like synthesized speech. The text to speech capability is also known as speech synthesis. Use human like standard voices out of the box, or create a custom voice that's unique to your product or brand."

  Usage · free tier · public pricing · self-serve

• Amazon Polly

  "Amazon Polly is a cloud service that converts text into lifelike speech. You can use Amazon Polly to develop applications that increase engagement and accessibility."

  Usage · free tier · public pricing · self-serve

• Google Cloud Text-to-Speech

  "Cloud Text-to-Speech converts text or Speech Synthesis Markup Language (SSML) input into audio data of natural human speech."

  Usage · free tier · public pricing · self-serve

• Cartesia (Sonic)

  "The fastest and most natural text to speech model"

  Hybrid · free tier · public pricing · self-serve

• Murf AI

  "Enterprise-grade AI voice generation with 150+ natural-sounding voices across 35 languages and 20+ speaking styles."

  Usage · public pricing · self-serve

Rime alternatives · Rime vs ElevenLabs Text to Speech · All Text-to-Speech APIs APIs

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

1. ↑Description: rime.ai
2. ↑Pricing model: rime.ai · rime.ai
3. ↑Published pricing: rime.ai
4. ↑Free tier: rime.ai · rime.ai
5. ↑Self-serve signup: rime.ai
6. ↑Enterprise plan: rime.ai
7. ↑Minimum commitment: rime.ai
8. ↑Supported actions: docs.rime.ai · docs.rime.ai
9. ↑Regions: docs.rime.ai
10. ↑Languages: docs.rime.ai · docs.rime.ai
11. ↑Output types: docs.rime.ai
12. ↑Sandbox: rime.ai
13. ↑SDK languages: docs.rime.ai
14. ↑MCP server: github.com
15. ↑SOC 2: rime.ai
16. ↑HIPAA: rime.ai · rime.ai
17. ↑GDPR: rime.ai
18. ↑Published SLA: rime.ai · rime.ai
19. ↑Rate limits: rime.ai · docs.rime.ai
20. ↑Known restrictions: docs.rime.ai · docs.rime.ai

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

1. 2026-06-21 Capabilities: {} → {"streaming":true,"multilingual":true,"voice_cloning":true,"word_timestamps":tr…
2. 2026-06-21 Summary Md: (none) → Rime is a text-to-speech API built for high-stakes enterprise voice application…
3. 2026-06-21 Score Pricing Transparency: (none) → 85
4. 2026-06-21 Score Agent Friendliness: (none) → 45
5. 2026-06-21 Score Setup Speed: (none) → 50
6. 2026-06-21 Score Docs Quality: (none) → 45
7. 2026-06-21 Score Procurement Friction: (none) → 85
8. 2026-06-21 Score Trust Readiness: (none) → 40
9. 2026-06-21 Best For: (none) → Regulated or enterprise workloads - compliance attestations and an enterprise p…
10. 2026-06-21 Avoid If: (none) → You want to try it free before paying
11. 2026-06-21 Scoring Methodology: (none) → Scores are computed deterministically from this profile's published, sourced fi…
12. 2026-06-21 Has Structured Data: (none) → Yes
13. 2026-06-21 Robots Allows Agents: (none) → Yes
14. 2026-06-21 API Reference URL: (none) → https://docs.rime.ai/api-reference/quickstart
15. 2026-06-21 Status Page URL: (none) → https://status.rime.ai
16. 2026-06-21 Docs URL: (none) → https://docs.rime.ai/docs/introduction
17. 2026-06-21 Rendering: (none) → static
18. 2026-06-21 Llms Txt Present: (none) → Yes
19. 2026-06-21 Llms Txt URL: (none) → https://rime.ai/llms.txt
20. 2026-06-21 Minimum Commitment: set to Enterprise plan requires a minimum annual commitment (amount not published).
21. 2026-06-21 Self Serve Signup: set to Yes
22. 2026-06-21 Requires Sales Call: set to No
23. 2026-06-21 Enterprise Plan Available: set to Yes
24. 2026-06-21 SOC 2: set to type_2
25. 2026-06-21 HIPAA: set to Yes
26. 2026-06-21 SLA Published: set to No
27. 2026-06-21 Data Retention Policy URL: set to https://rime.ai/privacy
28. 2026-06-21 Documented Rate Limits: set to Starter plan: 20 concurrent TTS generations. Enterprise plan: unlimited (expand…
29. 2026-06-21 Rate Limit Requests: set to 20
30. 2026-06-21 Rate Limit Window: set to concurrent
31. 2026-06-21 Known Restrictions: set to 3,000 character limit per HTTP request, SSML not supported, Starter plan servic…
32. 2026-06-21 Auth Methods: set to api_key
33. 2026-06-21 Auth Docs URL: set to https://docs.rime.ai/docs/api-authentication
34. 2026-06-21 API Style: set to rest
35. 2026-06-21 Base URL: set to https://users.rime.ai/v1/rime-tts
36. 2026-06-21 API Version: set to v1
37. 2026-06-21 Versioning Scheme: set to url
38. 2026-06-21 Stability: set to ga
39. 2026-06-21 Quickstart URL: set to https://docs.rime.ai/api-reference/quickstart
40. 2026-06-21 Error Format: set to vendor-specific
41. 2026-06-21 Requires Verification: set to No
42. 2026-06-21 Starting Price Usd: set to 30
43. 2026-06-21 Price Basis: set to 1M characters
44. 2026-06-21 Slug: set to rime
45. 2026-06-21 Launched At: set to 2022-01-01
46. 2026-06-21 Notable Customers: set to ConverseNow, Domino's
47. 2026-06-21 Fields Not Found: set to gdpr, iso_27001, pci_dss, sla_published (Enterprise SLAs mentioned but no publi…
48. 2026-06-21 Source Confidence: set to high
49. 2026-06-21 Extractor: set to claude-subagent:sonnet
50. 2026-06-21 Last Verified At: set to 2026-06-21T00:00:00.000Z

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/rime \
  -H 'Content-Type: application/json' \
  -d '{"kind":"review","rating":5,"body":"Your experience with this API…"}'

curl -X POST https://apio.sh/api/suggest/rime/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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