Retell alternatives: AI voice agents compared
Updated September 2026
Retell is a developer platform for building voice agents, with per-minute pricing and a free credit to start. CallBolt's Sky is the handled-for-you option: one agent for calls, tickets and outbound campaigns, scoped and built with you.
Where is Retell strong?
Retell gives developers the pieces to build a custom voice agent: a template and documentation library, your choice of models, and published per-minute pricing ($0.07 to $0.31 per minute) with a $10 free credit to start.
How does CallBolt compare to Retell?
| CallBolt (Sky) | Retell | |
|---|---|---|
| Channels in one agent | Calls, tickets and campaigns | Voice calls |
| Languages | 26+ spoken natively, 52 understood | Not listed on their pricing page |
| Pricing model | Scoped to the use case; no per-seat fees; quote from the team | $0.07 to $0.31 per minute, $10 free credit |
| Getting started | Talk to the team, reply within one business day | Self-serve developer platform |
Who should pick Retell, and who should pick CallBolt?
Pick Retell when
- You have engineers who want to build and tune the agent themselves
- You want per-minute pricing and a free credit to prototype with
- Voice calls, including batch and scheduled outbound, are the whole scope; no ticket handling is documented
Pick CallBolt when
- Calls, tickets and outbound follow-ups should be one agent's job
- You would rather describe the workflows than build them
- Multilingual is built in: 26+ languages spoken natively, 52 understood
If one agent for the phone and the queue is the shape you want, the AI customer support agent page shows the flow step by step.
What does CallBolt not do here?
Teams that want to assemble their own agent from models and parts will get there faster on a developer platform like Retell. CallBolt is the handled-for-you option: we scope and build the workflows with you instead of handing you a toolkit.
Frequently asked questions
Is CallBolt a good alternative to Retell?
Yes, when the goal is a working agent rather than a build project. Sky handles calls, tickets and outbound campaigns out of the box, while Retell gives developers the platform to construct their own voice agent.
How does CallBolt's pricing compare to Retell's?
Retell publishes $0.07 to $0.31 per minute with a $10 free credit. CallBolt's plan is scoped to your use case with no per-seat fees, sized to your call and ticket volume, and quoted by the team within one business day.
Does Retell handle support tickets?
Retell's pricing page covers voice minutes only; no ticket product is listed. On CallBolt, the phone call and the follow-up ticket are one agent's workload.
Which is better for a non-technical team, Retell or CallBolt?
CallBolt. Retell is built for engineers who want to construct and tune the agent themselves; CallBolt scopes and builds the workflows with you, and the team answers within one business day.
Can I prototype on Retell and move to CallBolt later?
You can, but they are different shapes: a self-built Retell agent and a scoped CallBolt deployment do not carry over. If the end state you want is production handled for you, starting with the team skips the detour.
Sources
The primary pages this comparison was checked against. We link them so you can verify; nothing here is an endorsement or an ad.
- Retell pricing page, checked 2026-09-03.
- Retell docs: create and schedule batch calls, checked 2026-09-04.
Hear Sky on a real call.
Share your volumes and stack with the team; a scoped quote follows, usually within one business day.
We usually reply within one business day.