Rapida AI

Rapida AI is an open-source platform for building and operating voice agents across phone, web, WhatsApp and SIP. It is best suited to agencies and technical teams that need control over providers, deployment and call operations. Its range is strong, but the free plan is limited to one agent.

Overview

Rapida brings provider routing, workflow connections and operational monitoring into one platform for voice agents. Managed cloud reduces infrastructure work; self-hosting gives teams or their clients control over where the service runs. That choice is valuable, but self-hosting requires Docker and at least 4 GB of RAM for Voice Only, or 8–16 GB with the knowledge base.

Key features

Teams can bring their own speech-to-text, text-to-speech and language-model providers, or route among them without rewriting application logic. Voice activity detection, noise cancellation, knowledge retrieval, LLM routing and live call transfer support conversation handling and escalation to a person. Documented integrations include Twilio, Vonage, Exotel, Asterisk, OpenAI, Anthropic, Google Gemini, Deepgram, ElevenLabs, Azure and AWS.

Agents can call HTTP endpoints during conversations and sync data from Notion, GitHub, HubSpot and Jira. Session traces, transcripts, call monitoring, handoff visibility, request and webhook logs, and debugging context help teams investigate production conversations. Agencies can create client-branded assistants, isolate workspaces and reuse rollout patterns—useful when serving multiple clients without combining their environments.

For teams hosting on their own infrastructure, Rapida says audio, transcripts and customer data stay there. Its credential vault encrypts API keys and OAuth tokens at rest. Self-hosting on HIPAA-compliant or GDPR-scoped infrastructure can be paired with the customer's own BAAs and DPAs, audit logs, configurable retention and transcript-level PII redaction. These options suit teams with data-control requirements, but put infrastructure and compliance responsibility on the customer.

Pricing

Rapida has a free plan and paid plans billed monthly. The key trade-off is scale: Launch is useful for a small build, but its one-agent cap and 10-day observability retention are far below the paid tiers.

Launch — free: One agent, bring your own STT, TTS, LLM and SIP, 10-day observability retention and community support. It suits a single-agent project that can supply its own providers; it does not include a stated audio-minute allowance.

Scale — $500 a month: Four agents, three collaboration workspaces, 100,000 audio session minutes, up to 200 concurrent sessions, 30-day observability retention and email support. This is the entry paid tier for teams operating several agents or needing substantial concurrency.

Grow — $2,000 a month: Unlimited agents, up to 20 workspaces, 500,000 audio session minutes, up to 1,000 concurrent sessions, 90-day observability retention, email and private Slack support. It fits larger operations whose agent, minute or concurrency needs exceed Scale.

Enterprise — custom pricing: Private or dedicated deployment, custom agent, workspace and concurrency limits, custom observability retention, custom local STT, TTS and LLM support, security review, deployment guidance, SLA and enterprise support. It is the option for organizations that need tailored limits or deployment and support arrangements.

Scale and Grow are billed per month. Inbound and outbound calls, human handoff and custom phone numbers are supported; the stated concurrent-call capacity is 200 calls, matching Scale's concurrency limit.

Platforms

Rapida supports API, Linux, macOS, self-hosted, web and Windows. Its managed cloud option avoids running the deployment infrastructure, while self-hosting gives teams or clients control over that infrastructure.

Who it's for

Agencies can use white-label assistants and isolated workspaces to serve clients. Enterprise teams, contact center operators, CPaaS and CCaaS companies, and developers are also identified as audiences. Provider choice and call visibility make Rapida especially relevant to technical teams operating voice agents in production; a team wanting a single-agent free starting point can begin on Launch, but teams needing more agents must move to a paid tier.

Pros and cons

Pro: Provider routing without rewriting application logic gives teams room to choose or change STT, TTS and LLM providers.

Pro: Managed cloud and self-hosted deployment let teams trade infrastructure control against operational effort.

Pro: Traces, transcripts, call monitoring and request and webhook logs support investigation of live operations.

Con: Launch allows only one agent and retains observability data for 10 days, limiting its usefulness for broader operations.

Con: Scale begins at $500 a month, and self-hosting requires Docker and meaningful memory capacity.

Alternatives

For broader agent-platform comparisons, see AI Voice Agents and Conversational AI Platforms.

LiveKit Agents is worth considering if its free Build tier—1,000 agent session minutes and five concurrent agent sessions—better suits a small starting workload.

Voiceflow may suit agencies looking for a free trial, usage-based billing and multi-client workspace management.

Intervo is an alternative for teams seeking a self-hosted, MIT-licensed open-source option.

Pipecat is a free alternative with usage-based agent hosting through Pipecat Cloud.

Retell AI may suit teams preferring pay-as-you-go pricing, with AI voice agents priced at $0.07–$0.31 per minute.

Tone is another option for teams wanting self-hosting, unlimited agents, calls and workflows, and their own LLM, voice and telephony.

Vapi may suit teams that prefer starting with a $0.05/min hosting charge and model costs passed through at cost.

Yellow.ai is an alternative for teams comparing a free plan with one AI agent and a 500/month included allowance.

Verdict

Choose Rapida AI if your team needs provider flexibility, deployment control and operational visibility for voice agents, particularly across client workspaces or production calls. Its free tier is narrow, and Scale's $500 a month is a substantial step up; teams needing a cheaper usage-based start or a simpler free tier should compare alternatives.