Symbl.ai

Symbl.ai is a conversation-intelligence platform for understanding and generating insights from human conversations across voice, video, and text. Its developer platform exposed Async, Streaming, and Telephony APIs plus the Nebula LLM for real-time speech-to-text and conversational insights — action items, topics, questions, follow-ups, sentiment, and custom trackers — with first-party SDKs for JavaScript, Web (browser), Python, and Go. Symbl.ai was acquired by Invoca (announced 2025-05-28) and the standalone developer platform is decommissioned: api.symbl.ai, docs.symbl.ai, platform.symbl.ai, nebula.symbl.ai and integrations.symbl.ai all fail to resolve in DNS as of 2026-08-14, so no endpoint is callable and no account can be created. What survives is real and public — the open-sourced documentation repository (github.com/symblai/symbl-docs), first-party Postman workspaces, the client SDKs on npm, PyPI and pkg.go.dev (newest release 2024-11-18), and the live marketing, blog, pricing and SOC 2 / HIPAA / PCI / GDPR compliance pages.

Symbl.ai is profiled on the APIs.io network. Tagged areas include Company, Conversation Intelligence, Speech-to-Text, Voice AI, and Artificial Intelligence.

Symbl.ai’s developer surface includes engineering blog, pricing, support, documentation, changelog, and 17 more developer resources.

🌐 Visit website 📡 Source on GitHub

35.2/100 thin ▬ flat Agent 3/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Conversation Intelligence Speech-to-Text Voice AI Artificial Intelligence Machine-Learning Real-Time SDK

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 35.2/100 · thin

Contract Quality 0.0 / 25

Developer Ergonomics 7.1 / 20

Access Clarity 13.7 / 20

Operational Transparency 6.5 / 13

Contract Governance 2.2 / 12

Discoverability 5.7 / 10

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/symblai: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Pricing Plans 1

Published pricing tiers and plan structures.

Symblai Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Symblai Rate Limits

8 limits

RATE LIMITS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Symblai Domain Security

TLSv1.3 · DMARC

SECURITY

Symblai Trust Center

SOC 2 Type II, HIPAA, PCI DSS, GDPR, CSA CAIQ

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Components

Components

Lifecycle

Lifecycle

Conformance

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

Postman

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Compliance

Compliance

TrustCenter

TrustCenter

Operate 3

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: symblai
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/symblai.png
name: Symbl.ai
description: 'Symbl.ai is a conversation-intelligence platform for understanding and generating insights from human conversations
  across voice, video, and text. Its developer platform exposed Async, Streaming, and Telephony APIs plus the Nebula LLM for
  real-time speech-to-text and conversational insights — action items, topics, questions, follow-ups, sentiment, and custom
  trackers — with first-party SDKs for JavaScript, Web (browser), Python, and Go. Symbl.ai was acquired by Invoca (announced
  2025-05-28) and the standalone developer platform is decommissioned: api.symbl.ai, docs.symbl.ai, platform.symbl.ai, nebula.symbl.ai
  and integrations.symbl.ai all fail to resolve in DNS as of 2026-08-14, so no endpoint is callable and no account can be
  created. What survives is real and public — the open-sourced documentation repository (github.com/symblai/symbl-docs), first-party
  Postman workspaces, the client SDKs on npm, PyPI and pkg.go.dev (newest release 2024-11-18), and the live marketing, blog,
  pricing and SOC 2 / HIPAA / PCI / GDPR compliance pages.'
url: https://raw.githubusercontent.com/api-evangelist/symblai/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- techstars
x-tier: stub
x-tier-reason: portfolio-lead
x-enrichment:
  date: '2026-08-14'
  status: enriched
  artifacts_added: 7
  pass: local-v1
x-coverage:
  state: none
  reason: no-developer-program
  detail: Symbl.ai's developer program no longer exists — api.symbl.ai, docs.symbl.ai, platform.symbl.ai, nebula.symbl.ai
    and integrations.symbl.ai were all removed from DNS after the Invoca acquisition, so there is no endpoint to call and
    the Sign-up button on the still-live pricing page points at a host that does not resolve.
  evidence:
  - url: https://api.symbl.ai/
    status: 0
  - url: https://docs.symbl.ai/
    status: 0
  - url: https://platform.symbl.ai/#/signup
    status: 0
  - url: https://symbl.ai/openapi.json
    status: 404
  - url: https://symbl.ai/company/pricing/
    status: 200
  checked: '2026-08-14'
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-08-14'
tags:
- Company
- Conversation Intelligence
- Speech-to-Text
- Voice AI
- Artificial Intelligence
- Machine-Learning
- Real-Time
- SDK
tags_raw:
- Company
- Conversation Intelligence
- Speech to Text
- Voice AI
- Artificial Intelligence
- Machine Learning
- Real Time
- SDKs
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://symbl.ai/
- type: DeveloperPortal
  url: https://symbl.ai/developers/
- type: Blog
  url: https://symbl.ai/developers/blog/
- type: GitHubOrganization
  url: https://github.com/symblai
- type: Pricing
  url: https://symbl.ai/company/pricing/
- type: Support
  url: https://symbl.ai/service-and-support/support/support-plans/
- type: TermsOfService
  url: https://symbl.ai/termsofservice/
- type: PrivacyPolicy
  url: https://symbl.ai/privacy-policy/
- type: Packages
  url: packages/symblai-packages.yml
- type: SDKs
  url: packages/symblai-packages.yml
- type: Components
  url: components/symblai-components.yml
- type: DomainSecurity
  url: security/symblai-domain-security.yml
- type: LLMsTxt
  url: llms/symblai-llms.txt
- type: Documentation
  url: https://github.com/symblai/symbl-docs
- type: Postman
  url: https://www.postman.com/symbldotai/workspace/symbl-ai/overview
- type: Lifecycle
  url: lifecycle/symblai-lifecycle.yml
- type: ChangeLog
  url: changelog/symblai-changelog.yml
- type: Plans
  url: plans/symblai-plans-pricing.yml
- type: RateLimits
  url: rate-limits/symblai-rate-limits.yml
- type: Conformance
  url: conformance/symblai-conformance.yml
- type: Compliance
  url: conformance/symblai-conformance.yml
- type: TrustCenter
  url: security/symblai-trust-center.yml

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