Compare / Amp vs Retell AI
Head-to-head
Amp vs Retell AI.
Side-by-side on ratings, pricing, pros, cons, and the honest take on which to pick. Cross-category comparison: Amp is a coding agent and Retell AI is a voice ai agent.
| Amp | Retell AI | |
|---|---|---|
| Rating | 4.0 / 5 | 4.0 / 5 |
| Category | Coding Agent | Voice AI Agent |
| Tech level | developer | low code |
| Open source | No | No |
| Pricing | Free tier with usage limits. Paid tiers via Sourcegraph subscription. Bundled with Sourcegraph Code Search for teams already on the platform. | Pay-per-minute usage: ~$0.07–0.10 per minute of voice conversation. Free tier with limited minutes. Volume discounts at enterprise scale. |
| Best for | Engineering teams already paying for Sourcegraph Code Search who want to add an AI agent that reuses the existing codebase index. Free tier is generous enough for individual evaluation. | B2B teams deploying voice agents for outbound sales, customer support, or appointment booking. Strong for builders who want a managed voice infrastructure without owning the telephony stack. |
| Not for | Teams not on Sourcegraph — the standalone story is less differentiated than Claude Code or Augment. Builders who want a simpler CLI experience. | Teams that need full control over the voice synthesis pipeline (use ElevenLabs Conversational AI). Teams with very low call volume — the per-minute pricing pays back at scale, not for occasional use. |
Our verdict on Amp
Sourcegraph's agentic coding tool built on years of code-search investment. Strong for teams already on Sourcegraph; less compelling as a standalone.
Full Amp review →Our verdict on Retell AI
Clean SDK, predictable pricing, sub-second latency. The builder-friendly voice agent platform for teams that want production voice without owning the infra.
Full Retell AI review →Amp
What works
- Built on Sourcegraph's mature code-search and indexing infrastructure
- Free tier with meaningful usage allowance
- Strong codebase-context story without separate indexing setup
- Native integration with Sourcegraph Code Search
- Sourcegraph's enterprise compliance story (SOC 2, on-prem options) carries over
What doesn't
- Standalone value less compelling than Claude Code or Augment for non-Sourcegraph teams
- Newer to agentic coding than competitors with longer track records
- Smaller community vs Cursor or Copilot
- Locked into Sourcegraph as the indexing/context layer
- Best fit narrows to teams already paying for Sourcegraph
Retell AI
What works
- Sub-second latency for natural-feeling conversation
- Built-in telephony — bring a phone number, plug in
- Function-calling support for CRM updates, calendar booking, etc.
- Predictable per-minute pricing scales linearly with volume
- Production-grade — used by hundreds of B2B teams in 2026
What doesn't
- Per-minute pricing adds up at very high volume
- Lock-in to Retell's voice stack
- Less flexibility than building on raw infrastructure
- Voice quality is good but not the best on the market
- Customer support response times vary
Which to pick
These two are closely matched. Don't pick on overall rating — pick on use case. Amp for engineering teams already paying for sourcegraph code search who want to add an ai agent that reuses the existing codebase index. free tier is generous enough for individual evaluation. Retell AI for b2b teams deploying voice agents for outbound sales, customer support, or appointment booking. strong for builders who want a managed voice infrastructure without owning the telephony stack.
Honest middle: most serious operators end up using more than one tool. If you're early in your AI agent journey, our five-question picker recommends a starting platform from your specific situation.
Common questions
Amp vs Retell AI — which should I pick?
Amp and Retell AI are closely matched (we rate them 4.0/5 and 4.0/5). Pick by use case rather than overall score: Amp for engineering teams already paying for sourcegraph code search who want to add an ai agent that reuses the existing codebase index. free tier is generous enough for individual evaluation.; Retell AI for b2b teams deploying voice agents for outbound sales, customer support, or appointment booking. strong for builders who want a managed voice infrastructure without owning the telephony stack..
Is Amp or Retell AI cheaper?
Amp's pricing: Free tier with usage limits. Paid tiers via Sourcegraph subscription. Bundled with Sourcegraph Code Search for teams already on the platform. Retell AI's pricing: Pay-per-minute usage: ~$0.07–0.10 per minute of voice conversation. Free tier with limited minutes. Volume discounts at enterprise scale. The right "cheaper" pick depends on usage volume and what's included — see the pricing row in the table above.
What's Amp best for?
Engineering teams already paying for Sourcegraph Code Search who want to add an AI agent that reuses the existing codebase index. Free tier is generous enough for individual evaluation.
What's Retell AI best for?
B2B teams deploying voice agents for outbound sales, customer support, or appointment booking. Strong for builders who want a managed voice infrastructure without owning the telephony stack.
Why compare Amp and Retell AI if they're different categories?
Amp is a coding agent and Retell AI is a voice ai agent. The comparison still matters because builders evaluating one often consider the other for adjacent jobs. See the recommendation section above for how to think about the cross-category choice.
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