Stammer.ai vs Synthflow AI: What You Need to Know
The two whitelabel agent plays: Stammer's $197 agency dashboard vs Synthflow's $2,000 whitelabel add-on — chat-first vs voice-first.
Reviewed by Maxime Houle, Founder, SeldonFrame. I build one of these tools — every ranking here says when the others win. Facts checked July 2026.- Stammer.ai pricing: $49–$497/mo tiers + usage (~$0.11–$0.17/min voice; per-message chat)
- Synthflow AI pricing: Usage-based from ~$0.08–$0.09/min + LLM & telephony add-ons; whitelabel listed at $2,000/mo or enterprise contracts from ~$30k/yr
- The real trade-off: The two whitelabel agent plays: Stammer's $197 agency dashboard vs Synthflow's $2,000 whitelabel add-on — chat-first vs voice-first.
- The third option: SeldonFrame ships the whole front office at $29/mo flat — see below
Stammer.ai
Stammer.ai is a white-label AI chat and voice agent platform. Agencies use it to resell agents under their own brand.
- +Agents-as-a-product is your entire offer
- +Your clients' CRM, site, and calendar are settled and staying put
- +You want a mature whitelabel chat-agent dashboard today
Synthflow AI
Synthflow AI is a no-code voice-agent builder for phone receptionists and appointment booking.
- +You want a mature template library for pure phone agents
- +Your clients' CRM and calendar are settled and staying put
- +You can absorb the whitelabel add-on price at your scale
Stammer.ai vs Synthflow AI vs SeldonFrame
| Features | Stammer.ai | Synthflow AI | SeldonFrame |
|---|---|---|---|
| Best for | Agencies reselling standalone chat/voice agents | Non-technical teams launching phone agents from templates | Agencies & builders running AI front offices for clients |
| Pricing model | $49–$497/mo tiers + usage (~$0.11–$0.17/min voice; per-message chat) | Usage-based from ~$0.08–$0.09/min + LLM & telephony add-ons; whitelabel listed at $2,000/mo or enterprise contracts from ~$30k/yr | From $29/mo flat — unlimited workspaces (agency whitelabel from $99/mo) |
| AI receptionist (calls, SMS, chat) | Yes — chat and voice agents | Yes — no-code voice agents with booking flows | Native — AI receptionist answers, qualifies & books across voice, SMS & web chat |
| Website, CRM & booking behind the agent | None — no CRM, website or booking calendar behind the agent | None — voice agent only; CRM, website and calendar live elsewhere | Included — multi-page website, CRM, booking calendar, intake forms, review requests in every workspace |
| Whitelabel & client workspaces | Yes — white-label dashboard at $197/mo | Yes, but as a $2,000/mo add-on or enterprise bundle | Included — whitelabel client portal, per-client workspaces, custom domains, one-click multi-client deploy |
| AI usage costs | Platform usage rates per message/minute on top of subscription | Per-minute, with engine/LLM/telephony pieces stacking | BYOK — bring your own AI (and Twilio) keys and pay providers at raw cost, zero markup |
| Sell / resell what you build | Yes — unlimited client resale, agency keeps markup | Yes — via the (paid) whitelabel program | Built in — publish agents to the marketplace or rent them via MCP (5% marketplace fee) |
Prices checked July 2026 on Stammer.ai's pricing page.
Prices checked July 2026 on Synthflow AI's pricing page.
Zoom out and see both against 23 other platforms on the interactive CRM Pricing Index →
The honest take
Stammer.ai: Choose Stammer if your offer is strictly agents-as-a-product and your clients' CRM, site, and calendar are already settled and staying put.
Synthflow AI: Choose Synthflow if you want a mature template library for pure phone agents and your clients already have their CRM and calendar sorted out.
Frequently asked questions
Which is better, Stammer.ai or Synthflow AI?
It depends what you need. Stammer.ai: Choose Stammer if your offer is strictly agents-as-a-product and your clients' CRM, site, and calendar are already settled and staying put. Synthflow AI: Choose Synthflow if you want a mature template library for pure phone agents and your clients already have their CRM and calendar sorted out.
What does Stammer.ai cost vs Synthflow AI?
Stammer.ai: $49–$497/mo tiers + usage (~$0.11–$0.17/min voice; per-message chat). Synthflow AI: Usage-based from ~$0.08–$0.09/min + LLM & telephony add-ons; whitelabel listed at $2,000/mo or enterprise contracts from ~$30k/yr.
Is there an alternative to both?
Yes — SeldonFrame ships the AI receptionist plus the website, CRM and booking calendar it books into, for $29/mo flat with unlimited workspaces. See how it compares: /alternatives.
Can I switch from Stammer.ai or Synthflow AI?
Yes — see the full switching guides for each: /alternative-to-stammer-ai and /alternative-to-synthflow.
Need what both Stammer.ai and Synthflow AI do?
Most people running this comparison actually need the outcome underneath both tools: calls and chats answered, leads qualified, jobs booked into a real calendar and CRM, on a site the client owns. SeldonFrame ships that whole front office from one conversation — $29/mo flat, unlimited workspaces, your own AI keys at raw cost, whitelabel included.