Kazoo
Kazoo: A customizable API platform for teams building and operating their own telecom services. Ranked #20 of 53 in Voice APIs by our editors (7.5/10); pricing: Pricing on request; best for enterprises building a self-hosted communications platform.
At a glance
- Editor score7.5 / 10
- PricingPricing on request
- Best forEnterprises building a self-hosted communications platform
- Free planNo
- Inbound callingYes
- Facts checked24 Sep 2026
Where it wins
- REST APIs and programmable callflows support custom telephony services.
- Handles PSTN routing, phone numbers, SIP devices and call recording.
- Open-source codebase can run on customer infrastructure.
Where it doesn't
- Requires contacting sales for hosted and private-cloud offerings.
- Self-hosted deployment means operating the platform on your infrastructure.
- Not a fit for teams seeking a verified free plan.
Our verdict on Kazoo
Kazoo is an API-based communications platform for communications service providers, carriers and organizations building customized, multi-tenant telecom services. Its open-source codebase supports self-hosted deployment, while 2600Hz also offers hosted and dedicated cloud environments. The feature set covers voice, video and SMS, with REST APIs for account, device, user and telephony management. It is aimed at teams that want to build and operate their own communications service rather than simply add a calling feature to an existing product.
The technical breadth is a central strength: Kazoo includes programmable callflows for IVR and dynamic routing, inbound and outbound PSTN routing, SIP device provisioning, phone-number lifecycle management, configurable call recording, and webhooks. Listed integrations include Slack, HubSpot, Duo and AWS. The category specifications also identify PHP, Python and Ruby for SDK languages. This combination suits organizations that need control over telecom workflows and infrastructure, though it also puts platform design and deployment decisions in the buyer's hands.
Pricing and deployment require a considered buying process. According to 2600Hz's published information, there is no public Kazoo pricing; hosted, private-cloud and infrastructure offerings require contacting sales. The open-source codebase allows self-hosting, but teams choosing that path should be prepared to run it on their own infrastructure. Email, community and documentation are listed support channels. Kazoo is worth evaluating for mid-market and enterprise teams building a communications platform, especially those needing self-hosting; it is less suitable for buyers seeking a ready-made voice API with public plan pricing or a free tier.
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Kazoo pricing
Kazoo fact sheet
| Free plan | No |
|---|---|
| Paid from | Not verified |
| Inbound calling | Yes |
| Outbound calling | Yes |
| Phone number support | Yes |
| SIP support | Yes |
| Call recording | Yes |
| Concurrent call limit | Not verified |
| SDK languages | PHP, Python, Ruby |
| Deployment | Cloud, Self-hosted |
| Platforms | Web |
| Support | Email, Community, Docs |
| Built for | Mid-market, Enterprise (editorial estimate) |
| Integrations | 4 integrations: Slack, HubSpot, Duo, AWS |
| Pricing | Pricing on request |
| Website | 2600hz.com |
| Facts checked | 24 Sep 2026 |
Kazoo integrations
Kazoo lists 4 integrations on its own site.
- Slack
- HubSpot
- Duo
- AWS
Alternatives to Kazoo
- Vonage Voice APIA broad voice API for building PSTN, SIP, WebRTC, IVR, and AI call workflows.9.4
- Twilio Elastic SIP TrunkingA focused SIP-to-PSTN service with secure trunking and pay-as-you-go voice charges.9.2
- Bandwidth Voice APIA broad PSTN voice API for calling, media control, transcription, and AI streaming.9.1
Also Ranked In
Kazoo is ranked in 2 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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