AI SUPPORTSOFTWAREBrowse 30 tools 
Side-by-side comparison
Compare audience fit, channels, integrations, knowledge sources, public pricing information, and operational considerations.
Both products appear in ai support agents and voice and contact-center ai. That overlap gives you a starting point; it does not mean the products cover the same channels, workflows, or deployment model.
Enterprise voice AI platform for natural customer-led conversations in contact centers.
Large contact centers automating high-volume inbound phone support.
Explore its buying criteria: AI support agents · Voice and contact-center AI.
Full PolyAI profile and vendor sources · Checked 2026-09-02
Developer platform for building, testing, deploying and monitoring production voice and chat agents.
Developers and startups building phone agents with APIs, webhooks and custom logic.
Explore its buying criteria: AI support agents · Voice and contact-center AI · Agent builders.
Full Retell AI profile and vendor sources · Checked 2026-09-02
The table below preserves each vendor’s scope and qualifiers. An unlisted feature is unverified here; it is not a claim that the feature is unavailable.
Before you decide
PolyAI: Per-minute voice usage at a negotiated rate, including ongoing maintenance, improvements and 24/7 support. Confirm call volumes, telephony and contract commitments in the proposal. Retell AI: Voice cost combines infrastructure, speech, model, telephony and optional per-minute features. Chat is charged per AI message. Phone numbers cost $2/month; 20 concurrent calls are included, with additional concurrency $8/month each. Use the selected configuration to estimate the monthly bill. Ask both vendors to quote the same expected workload, required channels, and implementation scope. Include required subscriptions and usage charges before comparing the total; the listed starting prices alone may cover different work.
The recorded sources for PolyAI include call-center knowledge; policies; CRM/business systems; procedures. For Retell AI, they include prompts; documents/knowledge bases; API tools; business systems. Ask each vendor to demonstrate ingestion or live access for the exact system you use, with permissions and refresh behavior. A source missing from this directory is not proof that a vendor cannot support it.
Use the same sample of real support requests, approved knowledge, and escalation rules in both pilots. Can it cite or restrict answers to approved knowledge? What happens when the agent is uncertain? Which actions can it complete beyond answering? Record answer quality, completed tasks, human handoffs, and total cost in the buyer worksheet. Check these specific cautions before launch: PolyAI: Quote-only and implementation-led; not a self-serve chatbot builder. Retell AI: Telephony, model, speech and other provider costs may be separate; technical integration work is expected.
Record your requirements and pilot results in the buyer worksheet →
On a small screen, swipe the table to compare both products.
| Criterion | PolyAI | Retell AI |
|---|---|---|
| Best fit | Large contact centers automating high-volume inbound phone support. | Developers and startups building phone agents with APIs, webhooks and custom logic. |
| Key capabilities | natural voice dialogue, intent handling, business-system actions, handoff, analytics | voice agent builder, drag-and-drop flows, call transfer, DTMF, transcripts, simulation testing, webhooks |
| Company sizes | enterprise | small, mid-market, enterprise, developer/startup |
| Channels | phone, contact center, voice assistants | phone, web chat, SMS, telephony |
| Integrations | telephony/contact-center systems, CRM, knowledge bases, APIs | telephony providers, webhooks, REST APIs, CRM/helpdesk via APIs |
| Knowledge sources | call-center knowledge, policies, CRM/business systems, procedures | prompts, documents/knowledge bases, API tools, business systems |
| Pricing model | Per-minute voice usage at a negotiated rate, including ongoing maintenance, improvements and 24/7 support. Confirm call volumes, telephony and contract commitments in the proposal. | Voice cost combines infrastructure, speech, model, telephony and optional per-minute features. Chat is charged per AI message. Phone numbers cost $2/month; 20 concurrent calls are included, with additional concurrency $8/month each. Use the selected configuration to estimate the monthly bill. |
| Pricing summary | Custom quote; no public monthly price for the general platform. Its managed voice deployment is likely to require a higher budget than self-serve tools; confirm with a quote. | Pay as you go: advertised voice range $0.07–$0.31/minute and chat from $0.002/message (USD). No base subscription commitment; selected models, telephony and add-ons can increase the total. Enterprise is quoted. |
| Free plan or trial | Demo available; no general self-serve free trial confirmed. | $10 in free credits to build and test; pay-as-you-go access has no commitment. |
| Differentiator | Voice-first focus and enterprise contact-center deployment. | Transparent usage entry point and production-oriented voice tooling for developers. |
| Considerations | Quote-only and implementation-led; not a self-serve chatbot builder. | Telephony, model, speech and other provider costs may be separate; technical integration work is expected. |
Large contact centers automating high-volume inbound phone support.
Voice-first focus and enterprise contact-center deployment.
Developers and startups building phone agents with APIs, webhooks and custom logic.
Transparent usage entry point and production-oriented voice tooling for developers.
Verify current pricing, limits, security, and required integrations directly with each vendor before purchasing.