Intervo vs Vapi

Intervo is a platform for creating AI voice and chat agents for business communication, including customer support, lead qualification, reception, onboarding, automation, and internal help. Businesses can give agents context from documents, websites, or knowledge bases. A website widget lets visitors type or speak with an agent, and the documentation describes connecting agents to phone numbers through Twilio for inbound and outbound calls. Intervo says agents can use OpenAI, Claude, or Gemini models and ElevenLabs or Microsoft Azure voice engines. Listed integrations include Calendly, webhooks, Intercom, Google Sheets, Cal, Slack, and Zapier; a custom API is marked as coming soon. It runs on the web, through an API, or as a self-hosted deployment. The free self-hosted plan includes source code under the MIT License and community support. Developer costs $10, paid once, while Business costs $129 a month; the pricing page also shows yearly billing at $99 USD/month and $129 USD/month.

Vapi is a voice-call platform available on the web and iOS. It supports inbound and outbound calls, human handoff, concurrent calls, and custom phone numbers. The usage-based No Success Package is listed at free and includes $5 in starter credits, one Vapi phone number, four concurrent calls, and full platform access. Core costs $29 a month, billed monthly, and includes five phone numbers, 10 concurrent calls, 30 days of raw data retention, and email support. Pro costs $999 a month, billed monthly, and includes 10 phone numbers, 30 concurrent calls, 180 days of raw data retention, RBAC, ZDR, and a 99% uptime SLA. Premier uses custom pricing; its listed options include custom phone-number counts and custom RBAC, ZDR, and SSO, with dedicated SIP available. The service listing says there is no free plan, although the No Success Package is presented at no cost with starter credits. Plan allowances vary, so the listed overall concurrent-call figure of 10 is not the allowance for every package.