SeldonFrame vs Vapi: Which Should You Choose? (2026)
Skip the engineering project. SeldonFrame ships a working receptionist — plus the website, CRM, and booking calendar it books into — from one conversation, for $29/mo flat on your own keys.
Vapi and SeldonFrame usually end up on the same shortlist for different reasons. Vapi is a developer-first API platform for building custom voice AI agents. You assemble and host your own voice stack. SeldonFrame comes at the same problem from the other direction: one flat $29/mo workspace where the AI receptionist, website, CRM, booking calendar and intake forms arrive pre-wired — generated from a single conversation in about 3 minutes.
Choose Vapi if you're an engineering team building a genuinely custom voice product and want full control over every piece of the stack. SeldonFrame's case is the opposite one: when the outcome you're buying is answered calls, qualified leads and jobs booked into a CRM you own, that whole front office ships on day one and the economics stay flat as you grow. The rest of this page walks the differences row by row — pricing model, the AI receptionist, the business system behind it, whitelabel, and what switching actually takes.
We make SeldonFrame, so read this comparison with that in mind — but we've tried to be specific about where Vapi genuinely wins below, not just where it doesn't.
- Vapi pricing: $0.05/min hosting + STT/LLM/TTS/telephony pass-through (~$0.25–$0.33/min real-world); HIPAA $2,000/mo
- SeldonFrame pricing: $29/mo flat, unlimited workspaces, first workspace free forever
- Pick Vapi if: You're an engineering team building a custom voice product
- Pick SeldonFrame if: You want a working receptionist without the engineering project
SeldonFrame
$29/mo flat · unlimited workspaces · first workspace free forever
- +An AI receptionist that answers calls, SMS, and web chat — and books real jobs into a real calendar and CRM
- +The whole front office included: multi-page website, CRM, booking, intake forms, review automation
- +$29/mo flat with unlimited workspaces — bring your own key and AI and phone service run at raw provider cost
- +You want a working receptionist without the engineering project
- +Your deliverable needs to include the CRM, website, and calendar the agent books into
- +You want flat, easy-to-read per-client costs instead of stacked per-minute pieces
Vapi
$0.05/min hosting + STT/LLM/TTS/telephony pass-through (~$0.25–$0.33/min real-world); HIPAA $2,000/mo
- +Full control over every piece of the voice stack (choice of STT/LLM/TTS)
- +The bring-your-own-API-key option removes markup on model costs
- +A large developer community and ecosystem
- +You're an engineering team building a custom voice product
- +You need full control over each piece (custom STT/TTS pipelines, custom orchestration)
- +You have developers on staff to own setup and maintenance
SeldonFrame vs Vapi: full feature & pricing breakdown
| Features | ★ RecommendedSeldonFrame | Vapi |
|---|---|---|
| Best for | Agencies & builders running AI front offices for clients | Engineering teams building custom voice stacks |
| Pricing model | From $29/mo flat — unlimited workspaces (agency whitelabel from $99/mo) | $0.05/min hosting + STT/LLM/TTS/telephony pass-through (~$0.25–$0.33/min real-world); HIPAA $2,000/mo |
| AI receptionist (calls, SMS, chat) | Native — AI receptionist answers, qualifies & books across voice, SMS & web chat | Voice agents only — you design, wire together and maintain them via API |
| Website, CRM & booking behind the agent | Included — multi-page website, CRM, booking calendar, intake forms, review requests in every workspace | None — no CRM, website or booking calendar; you build the system around the agent |
| Whitelabel & client workspaces | Included — whitelabel client portal, per-client workspaces, custom domains, one-click multi-client deploy | None — no agency dashboard or client management |
| AI usage costs | BYOK — bring your own AI (and Twilio) keys and pay providers at raw cost, zero markup | You can bring your own API key, but every other piece still bills per minute |
| Sell / resell what you build | Built in — publish agents to the marketplace or rent them via MCP (5% marketplace fee) | No native reseller program |
The old way: gluing tools together
a voice AI API covers one or two of these boxes
✗ leads fall through the gaps
The SeldonFrame way: one connected flow
Prices checked July 2026 on Vapi's pricing page.
Where Vapi wins
- +Full control over every piece of the voice stack (choice of STT/LLM/TTS)
- +The bring-your-own-API-key option removes markup on model costs
- +A large developer community and ecosystem
- +SOC 2, HIPAA, and PCI options for enterprise builds
The honest take: Choose Vapi if you're an engineering team building a genuinely custom voice product and want full control over every piece of the stack.
Where SeldonFrame wins
The $0.05/min isn't the real price
Add speech-to-text, the LLM, text-to-speech, and telephony, and real calls commonly land at 5–6× the advertised hosting fee. SeldonFrame runs on your own AI and Twilio keys at raw provider cost — no per-minute platform fee.
It's an engineering project
Vapi is an API. Someone has to design the agent, wire up the tools, host the logic, and fix it when an update breaks it. SeldonFrame builds a working receptionist just from a description of the business.
A voice agent isn't a front office
After you build the Vapi agent, you still need the CRM, the booking calendar, the website, and the client's dashboard. SeldonFrame includes all of it in every workspace — the agent books real jobs into a real calendar.
Nothing to hand your clients
Vapi has no whitelabel layer or client workspaces. SeldonFrame gives every client a branded portal your agency runs.
Pros & cons, side by side
SeldonFrame
- +An AI receptionist that answers calls, SMS, and web chat — and books real jobs into a real calendar and CRM
- +The whole front office included: multi-page website, CRM, booking, intake forms, review automation
- +$29/mo flat with unlimited workspaces — bring your own key and AI and phone service run at raw provider cost
- +Whitelabel built in: branded client portal, per-client workspaces, custom domains, one-click multi-client deploy
- +Build it free before you sign up — paste a URL, get a working workspace in about 3 minutes
- +Open core and portable — your agents are plain, editable skill files, and your data lives in your workspace
- −No funnel-builder or email-campaign suite — it's a front office, not a marketing automation platform
- −You bring your own key (Claude, ChatGPT, or Gemini, plus optional Twilio) — setup takes a few minutes
- −Newer platform — a smaller template library and community than decade-old incumbents
- −No native mobile app yet (the dashboard works fine on a phone browser)
Vapi
- +Full control over every piece of the voice stack (choice of STT/LLM/TTS)
- +The bring-your-own-API-key option removes markup on model costs
- +A large developer community and ecosystem
- +SOC 2, HIPAA, and PCI options for enterprise builds
- −Real-world cost is ~$0.25–$0.33/min — 5–6× the advertised $0.05 hosting fee
- −Most real setups need actual coding despite the no-code framing
- −Complaints about support and docs, plus agents breaking after platform updates
- −Voice-only — no CRM, website, booking calendar, or client dashboard
How to switch from Vapi to SeldonFrame
- 1
Build the replacement free (3 minutes)
Paste the business's website into seldonframe.com. SeldonFrame pulls out services, FAQs, and business facts and builds the workspace: site, CRM, booking calendar, intake, and the AI agent. No account needed until you claim it.
- 2
Bring what matters over
Your prompts and call flows carry over directly: paste your Vapi assistant's system prompt into the agent's skill file, and point your Twilio number at SeldonFrame when you're ready.
- 3
Connect your keys and number
Add your AI key (Claude, ChatGPT, or Gemini — about 30 seconds) and, for phone, connect your Twilio number so calls and missed-call text-back run at carrier cost.
- 4
Test the agent, then go live
Every agent ships with automatic tests. Talk to it, watch it book into the calendar, then publish. Point your domain over when the site's ready.
- 5
Run both in parallel for a week
Keep the old tool running while SeldonFrame answers the phones. Cancel it once the CRM shows the bookings landing — cancel-anytime on both sides means zero risk.
Frequently asked questions
Does SeldonFrame do real phone calls like Vapi?
Yes. The AI receptionist answers real phone calls, plus SMS and web chat, and books straight into the workspace calendar and CRM. Connect your own Twilio number and you pay carrier rates, not marked-up platform minutes.
I already built agents on Vapi — why switch?
If what you're delivering to clients is a working receptionist plus the business system behind it, SeldonFrame replaces the agent AND the CRM/calendar/website you'd otherwise stitch together yourself — all in one $29/mo platform you can whitelabel.
Is SeldonFrame a good Vapi alternative?
For most agencies and builders, yes — SeldonFrame replaces the AI-front-office job (answering, qualifying, booking, tracking in a CRM) at $29/mo flat instead of Vapi's stacked pricing. See the full switching guide: /alternative-to-vapi.
How much does Vapi cost compared to SeldonFrame?
Vapi: $0.05/min hosting + STT/LLM/TTS/telephony pass-through (~$0.25–$0.33/min real-world); HIPAA $2,000/mo. SeldonFrame: $29/mo flat, unlimited workspaces, first workspace free forever, with AI and telephony on your own keys at raw provider cost — no per-minute or per-credit meter.
How can SeldonFrame be $29/mo flat when competitors charge per minute or per credit?
Because you use your own keys. Your agents run on your own AI key (Claude, ChatGPT or Gemini) and, for phone, your own Twilio account. You pay the providers at raw cost. SeldonFrame never marks up tokens or minutes. You pay for the platform, not a meter.
Do you take a cut of what I charge my clients?
SeldonFrame works like Shopify: $29/mo flat, plus 2% on sales made through SeldonFrame checkout, plus 5% when you sell agents on the SeldonFrame marketplace. Client retainers you bill outside SeldonFrame cost nothing extra.
How fast can I see it working?
Paste in a business's website (or just describe it in a sentence). SeldonFrame builds the whole workspace — site, CRM, booking, intake, and the AI agent — in about 3 minutes. It's free, and you don't need to sign up first.
See it built for YOUR business
Don't take the table's word for it. Paste your website and get your own site, booking calendar, CRM and AI receptionist built in about 3 minutes — free, before you ever sign up.
No card. No call. Your data exports as JSON if you leave.
See it side by side before you decide
Paste a business's website and SeldonFrame builds the site, CRM, booking calendar and AI receptionist in about 3 minutes — free, before you sign up. Then it's $29/mo flat for unlimited workspaces.