Compare / Manus AI vs Retell AI
Head-to-head
Manus AI vs Retell AI.
Side-by-side on ratings, pricing, pros, cons, and the honest take on which to pick. Cross-category comparison: Manus AI is a autonomous agent and Retell AI is a voice ai agent.
| Manus AI | Retell AI | |
|---|---|---|
| Rating | 3.5 / 5 | 4.0 / 5 |
| Category | Autonomous Agent | Voice AI Agent |
| Tech level | no code | low code |
| Open source | No | No |
| Pricing | Free tier with limited daily usage. Paid plans start at ~$39/month. Enterprise pricing on request. Pricing has shifted multiple times in 2025–2026. | 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 | Non-technical builders who want an autonomous agent that can browse the web, research, and produce structured deliverables — without setting up a CLI or writing prompts repeatedly. | 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 | Developers who already have Claude Code, OpenAI Codex, or a similar agentic setup. The autonomous-browser angle is less useful when you already have a code-aware agent that can browse via MCP. | 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 Manus AI
Went viral in 2025 for autonomous browser demos. Genuinely capable for research tasks; less differentiated for builders who already have a coding agent setup.
Full Manus AI 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 →Manus AI
What works
- Genuinely autonomous — can complete multi-step tasks without per-step prompting
- Browser-native — handles workflows that require navigating real websites
- No-code interface, accessible to non-developers
- Free tier available for evaluation
- Strong viral mindshare — clients sometimes recognise the brand
What doesn't
- Pricing has shifted multiple times — verify current rates before committing
- Quality varies significantly by task type
- Less useful for builders who already have a code-aware agentic setup
- Closed-source, China-based provider — data residency may matter for some
- Slower than direct API approaches for tasks that don't need browser access
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
We'd default to Retell AI (4.0/5 vs 3.5/5) for most builders. Pick Manus AI if you fit its best-for case specifically: non-technical builders who want an autonomous agent that can browse the web, research, and produce structured deliverables — without setting up a cli or writing prompts repeatedly.
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
Manus AI vs Retell AI — which should I pick?
We rate Retell AI 4.0/5 vs 3.5/5 for Manus AI. Retell AI wins 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. — but pick Manus AI if you fit its specific best-for case (Non-technical builders who want an autonomous agent that can browse the web, research, and produce structured deliverables — without setting up a CLI or writing prompts repeatedly.). See the head-to-head table above for the full breakdown.
Is Manus AI or Retell AI cheaper?
Manus AI's pricing: Free tier with limited daily usage. Paid plans start at ~$39/month. Enterprise pricing on request. Pricing has shifted multiple times in 2025–2026. 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 Manus AI best for?
Non-technical builders who want an autonomous agent that can browse the web, research, and produce structured deliverables — without setting up a CLI or writing prompts repeatedly.
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 Manus AI and Retell AI if they're different categories?
Manus AI is a autonomous 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.
Compare Manus AI against other options