OpenPanel vs Vemetric in 2026: Two open-source, cookieless analytics tools with different AI angles
Both combine web and product analytics, are open-source, and skip cookies. OpenPanel leans into AI-agent integration with 38 MCP tools; Vemetric leans into detecting AI-sourced traffic itself.
OpenPanel
Vemetric- OpenPanel prices by event volume from $2.50/month for 5,000 events. Vemetric has a free tier for 2,500 events and a flat $5/month Professional plan with unlimited projects and unlimited team seats.
- OpenPanel ships 38 Model Context Protocol tools so AI agents can query analytics data directly. Vemetric instead auto-detects and attributes traffic referred from AI tools like ChatGPT, a different kind of AI integration entirely.
- OpenPanel includes A/B testing at every tier. Vemetric's public feature set does not document A/B testing as a capability.
- Vemetric caps its free plan at 1 month of data retention and 2,500 events. OpenPanel's cheapest paid tier at $2.50/month does not publicly cap data retention the same way.
- Both platforms are fully open-source and self-hostable, giving either one the same data-ownership argument for privacy-conscious or regulated teams.
- Vemetric supports funnels of up to 10 steps built from page views or custom events. OpenPanel's funnel builder is not step-limited in its documented feature set.
OpenPanel and Vemetric are the closest match in this category: both are open-source, both are cookieless, both combine product analytics with web analytics, and both are priced to undercut Mixpanel and Amplitude by a wide margin. The difference is in what each one does with AI. OpenPanel exposes 38 Model Context Protocol tools so an AI agent can query your analytics data directly, aimed at developer teams building agent-driven workflows. Vemetric instead auto-detects AI-sourced traffic, showing which pages attract visitors referred from tools like ChatGPT, aimed at teams who want to see whether AI search is sending them traffic. Both are priced aggressively, but OpenPanel scales by event volume from $2.50/month while Vemetric has a genuinely free tier and a flat $5/month unlimited-seat plan.
The tools at a glance
OpenPanel
Open-source product and web analytics with self-hosting, MCP integration, and Mixpanel-level event depth
OpenPanel is an open-source analytics platform combining product analytics and web analytics, priced by monthly event volume starting at $2.50/month for 5,000 events. The same codebase can be self-hosted on your own infrastructure, giving teams full control over data residency and retention.
Custom event tracking, funnel analysis, A/B testing, and revenue tracking are included at every pricing tier rather than reserved for a higher plan. The standout addition is 38 Model Context Protocol tools that expose OpenPanel data to AI agents, letting a framework like Claude Code query event counts or funnel metrics as part of an automated workflow.
The trade-off is that OpenPanel asks more of you technically than a plug-and-play tool, and there is no white-label option for agencies. For a developer-led team, the price-to-capability ratio is difficult to beat regardless.
| Feature | 5K events $2.50/mo | 100K events $20/mo | 1.0M events $90/mo | Custom Contact |
|---|---|---|---|---|
| Custom event tracking | ✓ | ✓ | ✓ | ✓ |
| Funnel analysis | ✓ | ✓ | ✓ | ✓ |
| A/B testing | ✓ | ✓ | ✓ | ✓ |
| MCP tools (38) | ✓ | ✓ | ✓ | ✓ |
| Self-hosting option | ✓ | ✓ | ✓ | ✓ |
Vemetric
Open-source, privacy-first analytics combining web traffic and product analytics in one cookieless platform.
Vemetric is an open-source, privacy-first analytics platform covering both web analytics and product analytics from a single tool. It tracks how users arrive at a site and follows them through the product, including user identification that merges anonymous pre-signup activity with post-signup behavior into one continuous timeline.
AI referral detection is automatic and requires no configuration: Vemetric identifies traffic from tools like ChatGPT, shows which pages attract that traffic, and lets you compare AI-sourced visitors against organic and direct sources. Funnels support up to 10 steps built from page views or custom events.
Vemetric is still an early-stage, single-founder product with a smaller integration ecosystem and thinner documentation than more established competitors. The free tier is genuinely usable, and the Professional plan at $5/month with unlimited projects and seats is aggressively priced, though the team has said pricing will rise as the product matures.
| Feature | Free $0/mo | Professional From $5/mo |
|---|---|---|
| Events per month | 2,500 | 10,000+ |
| Projects | 2 | Unlimited |
| Team seats | 2 | Unlimited |
| AI referral detection | ✓ | ✓ |
| Open-source / self-hosting | ✓ | ✓ |
Head-to-head feature comparison
| Feature | OpenPanel | Vemetric |
|---|---|---|
| Primary focus | Product and web analytics | Web and product analytics |
| Self-hosting option | Yes, open-source, any tier | Yes, open-source |
| Cookieless tracking | Yes, on the hosted plan | Yes, cookieless by design |
| A/B testing | Yes, all tiers | Not documented |
| Funnel step limit | Not step-limited in documented features | Up to 10 steps |
| AI-agent / MCP integration | Yes, 38 MCP tools | No |
| AI referral traffic detection | No | Yes, automatic |
| Team seats on entry tier | Not seat-limited in documented pricing | 2 seats (free), unlimited on Professional |
| Starting price | $2.50/mo (5K events) | $0/mo (free tier) |
Which should you choose?
OpenPanelVemetricOpenPanelVemetricVemetricOpenPanelThese two are close enough that the decision often comes down to which AI angle actually matters to you. If you want your own AI agents querying analytics data programmatically, OpenPanel's 38 MCP tools are the more direct fit. If what you actually want to know is whether ChatGPT and similar tools are sending you visitors, Vemetric's automatic AI referral detection answers that question out of the box with no setup. Both are open-source and self-hostable, so the data-ownership argument does not favor either one.
Bottom line
Choose OpenPanel if you want A/B testing included at every tier and plan to build AI-agent workflows on top of your analytics data via MCP. Choose Vemetric if a genuinely free tier, unlimited team seats at $5/month, and automatic AI-referral traffic detection matter more to you than A/B testing or a more mature ecosystem. Teams evaluating both should trial each against real event volume before committing, since Vemetric's free tier caps at 2,500 events and one month of retention.
Frequently asked questions
Is Vemetric cheaper than OpenPanel?
At the entry level, yes: Vemetric's free tier covers 2,500 events at no cost, and its Professional plan is a flat $5/month for unlimited projects and seats. OpenPanel starts at $2.50/month for 5,000 events but scales by event volume as you grow, which can overtake Vemetric's flat pricing at higher usage.
What is the difference between OpenPanel's MCP tools and Vemetric's AI referral detection?
OpenPanel's 38 MCP tools let an external AI agent, such as one running in Claude Code, query your analytics data directly as part of an automated workflow. Vemetric's AI referral detection is the reverse: it automatically identifies when your own website traffic came from an AI tool like ChatGPT, with no agent integration involved.
Which tool has better funnel analysis?
Vemetric documents a funnel builder supporting up to 10 steps built from page views or custom events. OpenPanel also includes funnel analysis at every tier, but its documented feature set does not specify a step limit, so the two are broadly comparable in this area.
Are both tools genuinely open-source?
Yes. Both OpenPanel and Vemetric publish their codebases publicly and support self-hosting on your own infrastructure, which gives either tool the same argument for teams with data residency requirements or a preference for full data ownership.
Which is the more mature product?
OpenPanel has a broader documented feature set, including A/B testing at every tier and 38 MCP tools, and a larger surrounding ecosystem. Vemetric is an earlier-stage, single-founder product with thinner documentation and a smaller integration ecosystem, though its core web and product analytics features are solid for the price.