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 meaningful usage allowance. Paid tiers $19–$49/month for individuals. Enterprise pricing for teams bundled with Sourcegraph Code Search. Token-based usage on top of subscription tiers. | 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. Strong for large enterprise codebases (1M+ lines) where context retrieval is the bottleneck. 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 Code. Solo developers and small projects where the codebase-context advantage doesn't compound. Builders who want a simpler CLI or terminal-first 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. The codebase-context story is genuinely differentiated for teams already running Sourcegraph at scale. As a standalone vs Cursor or Claude Code, it's solid but less obvious — the strategic moat is the Sourcegraph install base, not the agent itself.
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 for individual evaluation
- Strong codebase-context story without separate indexing setup
- Native integration with Sourcegraph Code Search
- Sourcegraph's enterprise compliance (SOC 2, on-prem options) carries over
- Cross-repo awareness that single-repo tools miss
- Active product velocity — feature gap vs Cursor is closing fast
What doesn't
- Standalone value less compelling than Claude Code or Augment Code for non-Sourcegraph teams
- Newer to agentic coding (launched mid-2025) than competitors with longer track records
- Smaller community vs Cursor or Copilot
- Locked into Sourcegraph as the indexing/context layer
- Best fit narrows to enterprise teams already paying for Sourcegraph
- Editor support skews VS Code-centric; JetBrains story less mature
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. strong for large enterprise codebases (1m+ lines) where context retrieval is the bottleneck. 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. strong for large enterprise codebases (1m+ lines) where context retrieval is the bottleneck. 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 meaningful usage allowance. Paid tiers $19–$49/month for individuals. Enterprise pricing for teams bundled with Sourcegraph Code Search. Token-based usage on top of subscription tiers. 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. Strong for large enterprise codebases (1M+ lines) where context retrieval is the bottleneck. 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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