Vendor intelligence
Hume AI
Hume TTS and EVI API sunset: announced access end November 13, 2026 at 05:01 UTC. Retained for historical comparison and migration research.
Read the signals. Keep the scope.
Migration & historical reference.
Best for
- Historical capability and pricing research
- Migration assessment for existing TTS / EVI API users
Watch-outs
- VoiceAgent.best recommends evaluating migration options rather than starting a new long-term TTS or EVI API deployment. This is our editorial judgment; replacement compatibility has not been established.
- EVI versions differ in languages and external-model requirements.
- External LLM charges and telephone service are not established as an all-in subscription price.
- Test the 30-minute session limit against your call flow.
Product specification
What the evidence says.
Unknown means we have not established it. It does not mean No. Compliance claims require plan and contract review.
White label
No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.
Source ↗ (opens in new tab)Source ↗ (opens in new tab)Client tenancy
No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.
Source ↗ (opens in new tab)Source ↗ (opens in new tab)Client billing
No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.
Source ↗ (opens in new tab)Source ↗ (opens in new tab)ISO 27001
Not established by the evidence reviewed. This does not mean unsupported.
No verified sourceBAA availability
Contact Hume legal to request BAA/DPA; existence of request path is not independent certification.
Source ↗ (opens in new tab)SIP
No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.
Source ↗ (opens in new tab)Source ↗ (opens in new tab)Warm transfer
Function tools may implement telephony actions externally. No built-in human-transfer consultation, queue routing, AMD or transfer-failure workflow established.
Source ↗ (opens in new tab)Source ↗ (opens in new tab)Cold transfer
No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.
Source ↗ (opens in new tab)Source ↗ (opens in new tab)Batch calling
Not established by the evidence reviewed. This does not mean unsupported.
No verified sourceMCP tools
Hume MCP exposes TTS tools to external clients. It does not establish EVI-runtime remote MCP support or a standalone service CLI.
Source ↗ (opens in new tab)Webhooks
Signed chat-started, chat-ended and tool-call event delivery to a customer endpoint.
Source ↗ (opens in new tab)Calendar
No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.
Source ↗ (opens in new tab)Source ↗ (opens in new tab)CRM
No supporting statement located in the bounded official corpus; confirm scope with vendor. Unknown is not No.
Source ↗ (opens in new tab)Source ↗ (opens in new tab)Bring your carrier
Direct Twilio-to-EVI endpoint supports inbound and outbound phone calls; carrier/account configuration and terms apply.
Source ↗ (opens in new tab)Bring your model
External Claude/GPT/Gemini or custom LLM configuration is documented; exact model/account availability varies.
Source ↗ (opens in new tab)Bring your voice
Custom Octave voice cloning documented; no universal catalog count, separate professional tier or arbitrary EVI TTS replacement endpoint established.
Source ↗ (opens in new tab)HIPAA / BAA
Supplier states HIPAA compliance; obtain appropriate Hume and downstream model-provider BAAs and verify configuration.
Source ↗ (opens in new tab)SOC 2
Vendor compliance claim; no independent report reviewed.
Source ↗ (opens in new tab)GDPR
Vendor compliance claim; no independent report reviewed.
Source ↗ (opens in new tab)Languages
EVI 4-mini supports the documented languages; EVI 3 language scope differs.
Source ↗ (opens in new tab)Voices
Not established by the evidence reviewed. This does not mean unsupported.
No verified sourceRealtime audio
Voice cloning
Architecture & connections
Understand the moving parts.
STT
Hume EVI ASR
LLM
OpenAI · Anthropic · Google Gemini
TTS
Hume EVI / Hume TTS
TELEPHONY
Twilio integration
Integrations
Hume MCP server · EVI webhooks
Evidence you can inspect.
A documented feature, a supplier claim and an unanswered question are different kinds of evidence.
Evidence coverage details
- Strong-source resolved
- 50
- Vendor-claim only
- 3
- Conditional
- 15
- Other sourced outcomes
- 0
- Unknown after research
- 46
- Conflicting evidence
- 0
- Not applicable
- 0
- Not researched
- 0
Inspect detailed evidence, sources and research gaps
September 2026 remains the historical baseline. A new research date does not mean a feature launched that day. Unknown after research and not researched are separate states.
Official documentation establishes what the supplier documents. No paid calls, independent product benchmarks or compliance audits were performed in this research pass. Coverage measures research work, never product quality.
The operating decision.
Price structure
Monthly bundle
V3.3 evidence review · Starter subscription reference; EVI 40 minutes; external LLM/telephony extra
Subscription includes TTS/EVI/Voice allowances; overage and managed external LLM usage add cost.
Human fallback
Unknown — no established fallback mode
No individually verified capability establishes this selection. Conditional support and vendor claims do not satisfy Strict Must-have.
Documented transfer is not a staffed human service. Verify who answers, when they answer and what happens if they do not.
Try it yourself
Unknown — no independently checked public demo entry is attached.
External signals
No dated external signal in this record. Missing evidence is not a negative review.
Underlying model context: the documented stack above does not establish an exact benchmark checkpoint or its deployed settings. Public model results cannot become a Hume AI score.
Append-only price history
Every capture leaves a trace.
A new check creates a new snapshot. Deltas appear only for the same currency, unit, model and scope.
Tracked: $3 / month · Starter subscription; displayed TTS/EVI plan allowances
Tracked: $3 / month · V3.3 evidence review · Starter subscription reference; EVI 40 minutes; external LLM/telephony extra
Tracked: $3 / month · V3.3 evidence review · Starter subscription reference; EVI 40 minutes; external LLM/telephony extra
New research observations preserve earlier captures. “Evidence improved” records what we learned; it does not claim the market changed on that date. September 2026 is the historical baseline.
Price the actual workflow.
Complete cost cannot be established from this reference. Selected external LLM, carrier, token/character consumption and overages prevent a complete cost ceiling from monthly minutes alone. · Hume-managed external LLM usage extra; BYO key/custom model paid outside Hume; Twilio separate
Carry the current source into your estimate, then enter the model, voice, carrier and fixed fees your configuration needs.
Alternatives by category
Other voice engines to inspect.
Alphabetical alternatives within the same category. An editorial starting point, not a performance ranking.
Evidence archive
Inspect the record.
Hume pricingreviewed
Starter is $3/month; Free lists 10K TTS characters and 5 EVI minutes. Starter lists 30K characters and 40 EVI minutes. Creator is normally $14/month, with a $7 first-month promotion. Enterprise lists SOC 2 Type II, GDPR and HIPAA. The displayed table has product/model selectors; rates must retain that context.
Inspect official source ↗Hume billingreviewed
One subscription includes TTS, EVI and voice features with plan-specific included usage and overages. Hume-managed external LLMs add usage charges. A separately supplied LLM key is not charged by Hume, but can incur the other provider bill.
Inspect official source ↗Hume EVI overviewreviewed
EVI handles ASR, model responses and streamed speech over WebSocket. EVI 3 is English-only; EVI 4-mini lists 11 languages and requires a supplemental LLM. A session has a documented 30-minute limit. Voice design and cloning are supported.
Inspect official source ↗Hume MCP serverreviewed
Hume supplies an MCP server to make its audio capabilities available to MCP clients. This does not by itself mean every EVI agent can invoke arbitrary external MCP tools.
Inspect official source ↗Hume EVI webhooksreviewed
EVI configurations support webhook notifications for chat events, with server endpoints and authentication setup.
Inspect official source ↗Hume Twilio integrationreviewed
Hume documents connecting EVI to phone calls using Twilio. Carrier services and the application integration are distinct from speech subscription usage.
Inspect official source ↗Hume EVI API sunset noticereviewed
Hume TTS and EVI API sunset: announced access end November 13, 2026 at 05:01 UTC. Retained for historical comparison and migration research. Hume states both APIs remain supported until that deadline; account data is permanently deleted after November 13, with no exact deletion time stated.
Inspect official source ↗Hume TTS API sunset noticereviewed
Hume TTS and EVI API sunset: announced access end November 13, 2026 at 05:01 UTC. Retained for historical comparison and migration research. Hume states both APIs remain supported until that deadline; account data is permanently deleted after November 13, with no exact deletion time stated.
Inspect official source ↗Evidence describes documented scope, not a tested platform score. Unknown means a conclusion has not been established; API connectivity does not establish a native integration. Read our research methodology →
Public affiliate terms and API eligibility were not verified. No approved tracking link is on file.
Partner eligibility and commercial terms are Unknown in this review.