Agentic Index
Cartesia vs Deepgram (2026)
Cartesia and Deepgram are both voice infrastructure for agent builders, approaching from opposite strengths: Cartesia leads with low latency text to speech and full voice agents on cheap credit based tiers (free to prototype, Pro from 4 dollars, Startup at 39 dollars, Scale at 239 dollars a month, unlimited seats), while Deepgram leads with speech to text depth (Nova 3 from about half a cent a minute), adds Aura 2 text to speech at about three cents per thousand characters and a Voice Agent API at roughly five to sixteen cents a minute, with a 200 dollar free credit and Growth plans from about four thousand dollars a year. Choose Cartesia for voice first agents on a startup budget, Deepgram for transcription accuracy at production scale with enterprise self hosting.
| At a glance | Cartesia | Deepgram |
|---|---|---|
| Category | Agent infrastructure | Agent infrastructure |
| Entry price | Free plan; Pro from $4/mo; Startup $39/mo; Scale $239/mo; Enterprise; usage on credits and agent minutes | Free $200 credit; Pay as you go; Growth from about $4,000/year; Enterprise |
| Free / trial | Free plan for prototyping with limited credits, no commercial use | $200 free credit, never expires, no credit card, across all endpoints |
| Pricing confidence | public exact | public exact |
| Feature |
C
Cartesia
|
D
Deepgram
|
|---|---|---|
| Action & orchestration | ||
|
Integrations & Tool Calling Ability to connect agents to real systems through native integrations, OAuth-authenticated actions, custom tools, APIs, webhooks, or MCP-compatible tools. |
Full / Explicit | Full / Explicit |
|
Workflow Orchestration Ability to sequence, branch, retry, route, and combine deterministic workflow nodes with autonomous agent steps. |
Partial | Partial |
|
Triggers & Channel Coverage How agents wake up and where they work: schedules, webhooks, message events, CRM events, inbox events, chat, email, voice, and collaboration tools. |
Partial | Partial |
| Knowledge & context | ||
|
Knowledge Grounding & RAG Ability to ground agent behavior in company data through document ingestion, retrieval, external knowledge APIs, semantic search, or RAG layers. |
No / Not documented | No / Not documented |
|
Memory & State Persistence Ability to persist context across a run, conversation, workflow, user, team, or longer-term memory layer. |
No / Not documented | No / Not documented |
| Control & trust | ||
|
Human Oversight & Guardrails Approval steps, consent checkpoints, escalation rules, structured guardrails, policy constraints, and pause/resume controls. |
No / Not documented | No / Not documented |
|
Security, Identity & Governance RBAC, SSO, auditability, encryption, least-privilege tool access, compliance posture, and data handling policy. |
Partial | Full / Explicit |
|
Observability & Auditability Traces, logs, execution histories, metrics, audit events, and debugging detail for production agent behavior. |
Partial | Partial |
|
Deployment & Data Residency Deployment modes and options, including SaaS, dedicated cloud, VPC, on-prem, hybrid, local runtime, and self-hosting. |
Full / Explicit | Full / Explicit |
| Solution readiness | ||
|
Prebuilt Agents, Templates & Packs Ready-made workflows, packaged employees, templates, blueprints, industry solutions, and role-specific agents that reduce time-to-value. |
No / Not documented | No / Not documented |
| Platform extensibility | ||
|
Model Flexibility & Routing Ability to work across multiple foundation models, route tasks to different models, or let buyers bring their own providers and keys. |
Partial | Partial |
|
APIs, SDKs & MCP Extensibility Composability layer: stable APIs, SDKs, MCP tool consumption/serving, custom tools, and integration into internal systems. |
Full / Explicit | Full / Explicit |
|
Testing, Debugging & Optimization Testing, debugging, scoring, retries, fallbacks, quality gates, and optimization loops for improving agent workflows before and after deployment. |
No / Not documented | No / Not documented |
| Specialist automation | ||
|
Browser & Computer Use Browser, desktop, or remote/local computer control for workflows that cannot be handled through stable APIs alone. |
No / Not documented | No / Not documented |
Pricing snapshot
Sourced from the Index pricing dataset · open each vendor's profile for full detail.
| Pricing |
C
Cartesia
|
D
Deepgram
|
|---|---|---|
|
Entry price Lowest public entry point |
Free plan; Pro from $4/mo; Startup $39/mo; Scale $239/mo; Enterprise; usage on credits and agent minutes | Free $200 credit; Pay as you go; Growth from about $4,000/year; Enterprise |
|
Pricing confidence How public the numbers are |
Public — exact | Public — exact |
|
Billing Primary billing axis |
credits (characters, seconds) and agent minutes | usage (minutes, characters, agent minutes) |
|
Variable cost Workload / overage exposure |
High variable cost | High variable cost |
|
Free tier / trial Try before you buy |
Free tier
|
Free tierTrial
|
|
Buying motion Self-serve vs sales call |
Mixed | Mixed |
Choose Cartesia if
- Low latency voice output quality is the make or break for your agent experience.
- Entry pricing from 4 dollars a month with unlimited seats fits an early team.
- You want telephony and agent minutes bundled into one credit system.
Choose Deepgram if
- Speech recognition accuracy on real world audio is your hardest problem.
- Self hosted deployment and HIPAA support are enterprise requirements.
- A 200 dollar free credit lets you benchmark thoroughly before committing.