Helion

Helion is an open-source product and web analytics platform for teams that need event-level insight into how users behave. It fits organizations willing either to operate their own analytics stack or to pay for a managed deployment. The strongest case is its unusually broad feature set; the main caution is that hosted cost is tied directly to event volume.

Overview

Helion brings event tracking, user profiles, funnels, cohorts, retention analysis, real-time dashboards, session replay, A/B testing and revenue tracking into one product. That combination lets product and growth teams connect acquisition behavior, conversion paths and repeat usage instead of maintaining separate tools for each question. ClickHouse stores events and executes analytics queries, a sensible foundation for event-heavy workloads.

Tracking is cookieless by default and does not require third-party tracking cookies, which suits teams trying to reduce dependence on browser identifiers. Helion's MCP server allows Claude, Cursor and other MCP-compatible clients to query analytics data. Notifications triggered by events can be delivered to Slack, Discord or a custom webhook, with JavaScript transforms for tailoring payloads.

Key features

Analysis, experimentation and replay

Funnels, cohorts and retention reports make Helion useful for investigating where users drop out and whether they return. Real-time dashboards support operational monitoring, while A/B testing and revenue tracking extend the platform into experiment and commercial analysis. Session replay supplies visual context alongside events, but it is opt-in and disabled by default. The stated 30-day replay retention makes it better for recent investigations than for long-term behavioral archives.

AI access and integrations

The MCP server is a practical advantage for teams already using compatible AI clients and wanting conversational access to analytics data. It does not replace carefully designed reports, but it can shorten the path from a question to an exploratory query. Event-triggered delivery to Slack, Discord and webhooks covers common alerting workflows; JavaScript payload transforms are useful when downstream systems require a particular format.

Deployment and development

Self-hosting runs through Docker Compose on a VPS, Kubernetes cluster or cloud provider. The software is open source under AGPL-3.0, giving technically capable teams control over deployment and data location while making operational responsibility part of the bargain. SDK support covers JavaScript, React, Next.js, Astro and Python, with additional platforms listed by the maker. Discord handles usage questions, GitHub issues handle bugs and feature requests, and email is directed to enterprise and partnership inquiries.

Pricing

Helion uses events as its primary pricing metric.

PlanPriceWhat it includesSelf-hostedfreeUnlimited events and all featuresHelion Cloud$90 a month1M events and all featuresThe self-hosted plan is the clear fit for engineering-led teams that can run Docker Compose infrastructure and want unlimited event collection without a subscription. Its price advantage comes with responsibility for hosting, upgrades and production operations. Helion Cloud is simpler for teams that prefer a managed service, but 1M events per month is the controlling limit; high-volume products should estimate event generation before committing. Both plans include the full feature set, so the cheaper option does not remove analytics capabilities. A 30-day trial is offered, which gives prospective Cloud users a short period to assess fit before paying.

Platforms

Helion supports Android, iOS, Windows, macOS, Linux, web applications, APIs and self-hosted deployments. That breadth suits teams measuring products across mobile and web rather than a single application surface.

Who it's for

Helion is a strong match for product teams that need funnels, retention, cohorts, replay and revenue data in one system, especially when cookieless tracking matters. It is also well suited to developers who want open-source control, ClickHouse-backed querying and AI-client access through MCP. Teams without the capacity to operate infrastructure should favor Helion Cloud; teams expecting substantially more than 1M monthly events should scrutinize the hosted allowance or choose self-hosting.

Pros and cons

Pros

Broad analytics coverage: event tracking, profiles, funnels, cohorts, retention, replay, experimentation and revenue tracking share one platform.

Unlimited self-hosted events: the free plan removes an event quota for teams prepared to manage deployment.

Privacy-conscious default: cookieless tracking avoids a dependency on third-party tracking cookies.

Flexible automation: Slack, Discord and webhook notifications support event-driven workflows with programmable payloads.

Cons

Cloud volume ceiling: 1M events per month can become restrictive for high-traffic products at $90 a month.

Operational burden: self-hosting shifts infrastructure, maintenance and security work to the customer.

Short replay history: 30-day retention limits review of older sessions, and replay requires deliberate opt-in.

Alternatives

Consider GameAnalytics instead if you want a free plan with no MAU limits, predefined and custom dashboards, and core events, funnels, cohorts, retention and real-time reporting across the same broad platform range.

Zoho Apptics is a better fit when a permanently free plan with one project, five applications per project, 5K errors per month and 25K engagements per month matches your scale.

Choose Aptabase when you want an open-source alternative with self-hosting and a free allowance of up to 20,000 events per month.

devtodev suits teams looking for a free tier capped at 25k MAU, 30 custom events, five team members and three months of raw-data storage.

Pick Pendo Analytics when its free 500-monthly-active-user tier combines product analytics with in-app guides.

PostHog is an alternative open-source analytics product with a free plan and no free trial.

Choose UXCam when a free allowance of 3,000 sessions per month and two app keys is the relevant starting point.

OpenPanel is worth considering for a low-cost hosted entry plan at $2.50 a month for 5K events, unlimited websites or apps and unlimited users.

For a wider comparison, see the Product Analytics Tools list.

Verdict

Choose Helion if you want one open-source platform covering serious product analytics and can either run it yourself or stay within a 1M-event Cloud allowance. Look elsewhere if operating infrastructure is unacceptable or your event volume makes that hosted ceiling a poor fit.