Comparison
Spelo vs Voiceflow: which voice AI fits your site?
They both ship voice agents, but they are built for different jobs. Spelo is a drop-in widget you paste onto a website and use the same hour. Voiceflow is a conversation design platform you build with. Here is the honest side-by-side.
| Feature | Spelo | Voiceflow |
|---|---|---|
| Primary use case | Embeddable voice widget for any website | Conversational AI builder/IDE |
| Time to first call | ~2 minutes (one script tag) | Hours to days (build flow first) |
| Page-aware (scrolls, clicks, fills forms) | Yes, built-in | No (focused on conversation logic) |
| Free tier | Yes, real free tier | Limited free workspace |
| Voice quality | OpenAI Realtime (gpt-realtime) | Bring-your-own (ElevenLabs, etc.) |
| Audio path | WebRTC, browser → OpenAI direct | Through Voiceflow runtime |
| Database lookups | 13 adapters out of the box | Custom integrations / API blocks |
| Where it lives | On your website, instantly | Web, IVR, WhatsApp, Slack, custom |
| Best for | Marketers and founders who want voice live today | Teams designing complex multi-channel flows |
| Pricing entry point | Free, then $29/mo | Free workspace, then $50+/mo per editor |
The short version
Voiceflow is a builder. You go in, design intents, draw flows, and publish to channels. That is a real, valuable job. Voiceflow is great if your voice agent has to handle intricate logic across phone, web, WhatsApp, and Slack with the same conversation tree.
Spelo is a widget. You paste one script tag onto your website and the voice starts answering visitors in under two minutes. The agent reads your live page, knows your services and prices because they are already on the page, and can scroll, click, and fill forms while it talks. It is built for one channel, the website, and it does that one job extremely well.
When Voiceflow is the right call
- You need the same conversation across phone, web, WhatsApp, Slack, and Teams.
- You have a conversation designer on the team who wants visual flow tooling.
- Your conversation has many branches and a single source of truth has to manage them all.
When Spelo is the right call
- You want voice on your website live this week, not next quarter.
- You do not have a conversation designer or want to skip that work entirely.
- The agent should actually do things on your page, like scroll, click, filter, highlight, and submit.
- You sell or schedule things online and visitors leave silently more often than you would like.
Can you use both?
Yes, and many teams do. Voiceflow handles the call center and IVR. Spelo handles the website. They speak to different visitors at different points in the funnel. There is no integration to manage. They share nothing except your brand voice.
FAQ
Common questions, honest answers
Still curious? Email hello@spelo.ai . Usually a same-day reply.
Is Spelo a Voiceflow alternative?
Spelo and Voiceflow solve overlapping but different problems. Voiceflow is a builder where designers and developers craft conversation flows in a visual editor and ship them across channels. Spelo is a drop-in widget: you paste one script tag and your website starts answering visitors by voice. If you want to build, pick Voiceflow. If you want voice live by lunch, pick Spelo.
Which is faster to launch?
Spelo is faster by an order of magnitude. The widget self-installs from one script tag and pulls its knowledge directly from your live site. Voiceflow requires you to build a project, design intents and flows, and connect to a voice provider before your first call. Most Spelo customers are live on day one. Voiceflow projects typically take days to weeks.
Can Voiceflow click around my page like Spelo can?
No. Voiceflow is designed around conversation logic, not browser actions. It can answer questions and trigger API calls, but it does not scroll, highlight elements, or fill forms on your live website. Spelo was built specifically to do that: the agent reads your DOM and can navigate, scroll, click, and fill on the same page the visitor is looking at.
Which is cheaper?
For website-only voice, Spelo is cheaper at every tier; there is a real free tier, and paid plans start at $29/mo. Voiceflow charges per editor seat and scales by Workspace tier; for multi-channel voicebots that go beyond websites, Voiceflow can be the better long-term spend. Calculate by minutes used, not seats.
Can I migrate from Voiceflow to Spelo?
You do not migrate. You co-exist. Voiceflow flows usually live in IVR, phone trees, or other channels. Spelo lives on your website. Many teams keep their Voiceflow project for the call center and add Spelo to the website to capture browsing visitors before they bounce.
Does Spelo use Voiceflow under the hood?
No. Spelo is built on the OpenAI Realtime API for voice and a proprietary page-aware runtime that reads and acts on your live DOM. There is no Voiceflow dependency; you do not need a Voiceflow account to use Spelo.
Which has better voice quality?
Both can sound great. Spelo ships with OpenAI Realtime (gpt-realtime), which is the same model behind ChatGPT Voice. Voiceflow leaves voice quality up to you; most Voiceflow projects route to ElevenLabs or Azure. If you want one good default, Spelo is simpler. If you want to A/B test voices, Voiceflow gives more knobs.
Try voice on your site in two minutes.
Free tier, one script tag, no credit card. See if Spelo fits before you decide what to compare it to.