You’ve settled on self-hosting your analytics. Data residency, cost control, no third party sitting between your users and your dashboard, the reasons are solid either way. But the moment you go looking for which tool to actually run, you land on two names that both call themselves open-source, both promise full data ownership, and both look, from the marketing page, like they do roughly the same thing.
They don’t. OpenPanel and PostHog solve overlapping problems with very different philosophies about what self-hosting should cost you, in server resources and in ongoing effort. One is a focused analytics tool that self-hosts the same product it sells in the cloud. The other is a much larger platform, of which analytics is one module among several, and self-hosting it means running a meaningfully heavier stack than its cloud version needs.
This guide breaks down the real differences, covers what each tool’s own documentation admits about self-hosting, and ends with the part most comparisons skip: where either one lands once you factor in the server it needs to run on. If you’re also weighing what OpenPanel is in the first place, our complete OpenPanel guide covers that in more depth.
TL;DR: OpenPanel vs PostHog
- OpenPanel optimizes for a lean, focused stack. Web and product analytics, funnels, cohorts, session replay, nothing more, and the self-hosted version matches the cloud version feature-for-feature.
- PostHog optimizes for breadth. Analytics, session replay, feature flags, A/B testing, surveys, error tracking, and a data warehouse in one platform, at the cost of a genuinely heavier self-hosted footprint.
- Self-hosted feature parity isn’t equal. OpenPanel’s self-hosted and cloud builds are identical. PostHog’s self-hosted community edition drops several cloud features, including Experimentation, Advanced Paths, and Advanced Permissions.
- The hardware gap is real and worth knowing before you provision anything. PostHog’s own documentation asks for 4 vCPU and 16 GB RAM as a self-hosting baseline, running Django, Celery, ClickHouse, Kafka, Zookeeper, PostgreSQL, Redis, and MinIO together. OpenPanel’s stack (Next.js, Fastify, PostgreSQL, ClickHouse, Redis) is lighter, seven containers instead of PostHog’s eight-plus.
- PostHog’s own docs recommend Cloud over self-hosting for anything past roughly 100,000 events a month, and don’t publish CVEs for self-hosted versions since there’s no tagged release to patch.
- Pricing philosophy differs too. OpenPanel’s cloud is flat-tiered ($2.50 to $90/month). PostHog’s cloud is usage-metered per product, generous on the free tier, but the bill can climb fast once replay, flags, and identified events stack up.
- Both are genuinely good tools. The right one depends on whether you want one thing done well or several things in one dashboard, and how much server you’re willing to run either way.
OpenPanel vs PostHog at a Glance
| Factor | OpenPanel | PostHog |
|---|---|---|
| Scope | Web + product analytics | Analytics, replay, flags, A/B testing, surveys, error tracking, data warehouse |
| License | AGPL-3.0 | MIT / Elastic License v2 (mixed) |
| GitHub stars | 6.8k | ~31.9k |
| Self-hosted stack | Next.js, Fastify, PostgreSQL, ClickHouse, Redis (7 containers) | Django, Celery, ClickHouse, Kafka, Zookeeper, PostgreSQL, Redis, MinIO, Caddy (8+ containers) |
| Official self-host hardware baseline | ~3 GB RAM floor per app manifest | 4 vCPU / 16 GB RAM / 30+ GB storage |
| Self-hosted vs cloud feature parity | Identical | Self-hosted drops Experimentation, Advanced Paths, Advanced Permissions |
| Self-hosted support | Community (Discord) | Community only; no official CVEs or tagged releases for self-hosted |
| Cookieless tracking | Yes, by default | Single first-party cookie, not cookieless |
| Cloud pricing | Flat tiers, $2.50–$90/month | Usage-based per product, free under 1M events/month, then from $0.00005/event |
| Best fit | Teams who want analytics done well and nothing else to maintain | Teams who want analytics plus flags, replay, and experiments in one platform |
If you only remember one line: OpenPanel is a smaller, more consistent tool to self-host; PostHog is a bigger, more capable platform that gets noticeably heavier once you’re the one running it.
What Is OpenPanel?
OpenPanel is an open-source web and product analytics platform built to combine Mixpanel’s depth with Plausible’s simplicity. It tracks events, funnels, retention, cohorts, and user profiles from a single dashboard, and it’s cookieless by default, so most sites skip the consent banner for analytics.
The detail that matters most in this comparison: OpenPanel’s self-hosted build and its paid cloud build run the same codebase with the same features. There’s no tiered feature set depending on where you deploy it. If you’re self-hosting specifically to avoid a stripped-down version of a product, that consistency is the whole appeal. For the full picture on what it tracks and how the stack is built, see our complete guide to OpenPanel.
What Is PostHog?
PostHog is an open-source product analytics platform that’s expanded well past analytics since its 2020 founding. Event tracking and funnels are still the core, but the platform now bundles session replay, feature flags, A/B testing, surveys, error tracking, and a data warehouse module, all under one login.
That breadth is the product’s actual pitch: instead of paying for Mixpanel, LaunchDarkly, Hotjar, and Sentry separately, PostHog wants to be all four. It largely delivers on that promise for teams that use most of the modules. The trade-off, and PostHog is candid about this in its own docs, is that depth suffers in any single module compared to a tool built to do just that one thing, and self-hosting the whole bundle means running the infrastructure for the whole bundle, whether you use every module or not.
The Differences That Actually Matter
1. Scope: one tool vs. a platform
This is the sharpest dividing line. OpenPanel does one job: analytics, web and product, in one dashboard. PostHog does six or seven jobs in one login. Neither approach is wrong, they’re different bets on what a team actually wants.
If your team already uses separate tools for feature flags and error tracking and just needs analytics to stop being a line item, OpenPanel’s narrower scope means less to configure, less to secure, and less server to run for a job you’ve already solved elsewhere. If you’re actively looking to consolidate multiple product tools into one platform, PostHog’s breadth is the point, and running one stack instead of four separate ones has its own operational upside.
2. Self-hosted feature parity
OpenPanel treats self-hosting as a first-class deployment path. What you self-host is what you’d get on the paid cloud tier, full stop.
PostHog treats self-hosting as the free, community-supported option, and says so plainly. Self-hosted PostHog drops several cloud-only capabilities, and PostHog’s own comparison flowchart in its documentation steers people toward Cloud unless they have a specific reason (privacy requirement, contractual data residency) to self-host instead. That’s an honest position from PostHog, not a hidden catch, but it does mean the two tools aren’t offering the same deal. With OpenPanel, self-hosting is the full product. With PostHog, self-hosting is a deliberately scoped-down version of it.
3. The hardware you’ll actually need
Here’s the part most comparison articles skip, because it only shows up once you’re the one paying for the server. PostHog’s official self-hosting docs specify 4 vCPU, 16 GB RAM, and 30+ GB storage as the baseline, and that’s before real event volume. The stack runs ClickHouse and Kafka together, which is the combination PostHog’s own guidance flags as the reason you can’t safely go smaller: under-provision the RAM and containers get OOM-killed.
OpenPanel’s self-hosting footprint is lighter. The official manifest asks for roughly 3 GB of RAM as a floor, and the stack (seven containers: dashboard, API, worker, PostgreSQL, ClickHouse, Redis, and the queue) doesn’t carry Kafka, Zookeeper, or MinIO. That’s a genuinely different weight class, and it translates directly into what you’re paying for compute regardless of which platform’s software you end up running.
4. What “self-hosted” is actually meant to handle
PostHog’s own documentation recommends self-hosted deployments scale to roughly 100,000 events per month before migrating to a Cloud instance. Past that, you’re expected to move, not to keep scaling the self-hosted stack. PostHog also doesn’t publish CVEs for self-hosted versions, since there’s no tagged release, every change ships continuously to Cloud and the latest Docker image, so patching means always tracking the newest image rather than applying a numbered security update.
OpenPanel doesn’t publish an equivalent volume ceiling for self-hosting. That’s partly because it’s a smaller, younger project with less publicly documented large-scale usage data, so treat this specific point as something to verify against OpenPanel’s own docs for your expected volume rather than assumed by comparison.
5. Cookie behavior and consent
OpenPanel is cookieless by default, using fingerprinting-style identification similar to Plausible’s approach, which typically keeps it outside cookie consent requirements. PostHog uses a single first-party cookie by default. Both avoid third-party trackers and both can operate without sending data off your infrastructure, but if avoiding a consent banner specifically is a priority, OpenPanel’s default behavior gets you there without extra configuration.
6. Pricing shape, if you go cloud instead
Even though this guide is about self-hosting, it’s worth knowing what you’re opting out of. OpenPanel’s cloud pricing is flat and tiered: $2.50/month at the low end, $90/month at 1 million events, same features at every tier. PostHog’s cloud is usage-metered per product, with a genuinely generous free tier (1 million analytics events, 5,000 session recordings, 1 million feature flag requests a month, all free), then per-event and per-recording charges that scale down at volume but stack across every module you use. For teams staying under the free tier, PostHog cloud can be the cheaper path. For teams that expect to grow past it, a flat-tier model is easier to forecast.
Can You Run Both?
This is the part most comparison articles skip entirely, and it’s worth asking. Yes, some teams do. It’s not unusual to run OpenPanel for the core web and product analytics dashboard everyone checks daily, while keeping PostHog (often on its free cloud tier) specifically for feature flags or A/B testing if that’s the one PostHog module you actually need. That avoids self-hosting PostHog’s full, heavier stack just to get flag management, while still keeping your main analytics data on infrastructure you control through OpenPanel.
Which One Should You Choose?
Choose OpenPanel if:
- ✅ You want analytics and nothing else bundled in
- ✅ You want self-hosted and cloud to be the exact same product
- ✅ You’d rather run a lighter server footprint
- ✅ Cookieless tracking by default matters to you
- ✅ You want pricing you can predict a year out, not meter-based billing
Choose PostHog if:
- ✅ You want feature flags, session replay, A/B testing, and analytics under one login
- ✅ You’re comfortable provisioning a 16 GB+ instance and keeping it patched continuously
- ✅ Your event volume fits comfortably under 100k/month for self-hosting, or you’re fine migrating to PostHog Cloud once you outgrow it
- ✅ You’d rather consolidate several product tools into one platform than run several smaller ones
Where to Host OpenPanel or PostHog
Whichever tool you land on, the deployment reality is the same shape: a multi-container stack, a domain, HTTPS, and a backup plan that covers every database involved, not just one of them. That’s true whether you’re running OpenPanel’s seven containers or PostHog’s eight-plus, and it’s the part that eats a weekend if you’re assembling it by hand for the first time. Our guide to Docker and its components covers what’s actually happening under the hood if you want the full picture before you start.
OpenPanel Hosting on xCloud deploys the self-hosted, full-featured version in a few clicks: the dashboard, API, and worker images pinned by digest, private PostgreSQL, ClickHouse, and Redis kept off the public internet, HTTPS issued and renewed automatically, and coordinated backups across all three volumes so you’re not restoring events with no accounts to attach them to. Given OpenPanel’s lighter hardware requirements compared to PostHog’s, it’s also the more forgiving of the two to run on a right-sized server rather than over-provisioning from day one.
👉 Deploy OpenPanel on xCloud →
If you’re managing infrastructure yourself either way, xCloud’s one-click app catalog covers nearly 300 Docker-hosted apps the same way, provisioned and patched without the manual Compose file assembly.
Pick Based on Scope, Not Just Features
Feature checklists make PostHog look like the obvious winner, since it does more. But “does more” and “is the right tool for what you actually need” aren’t the same question. If analytics is the whole job, OpenPanel gets you there with a smaller server, a simpler backup story, and no feature gap between what you self-host and what you’d pay for. If you’re trying to replace four separate SaaS subscriptions with one platform, PostHog’s breadth earns its heavier footprint.
Whichever direction you go, that’s the move worth making this week: pick the tool that matches the job you actually have, not the one with the longer feature list, and size the server to what its own documentation actually asks for rather than guessing.
If you have found this blog helpful, feel free to subscribe to our blogs for valuable tutorials, guides, knowledge, and tips on web hosting and server management. You can also join our Facebook community to share insights and engage in discussions.
Frequently Asked Questions
Is OpenPanel or PostHog better for self-hosting?
It depends on scope. OpenPanel is lighter to self-host and matches its cloud feature set exactly. PostHog is self-hostable too, but its own docs recommend Cloud past roughly 100,000 events a month and ask for a noticeably larger server (4 vCPU, 16 GB RAM) than OpenPanel needs.
Is PostHog free to self-host?
Yes, PostHog’s Docker-based self-hosted deployment is free and open source under an MIT license for the core product. Some cloud-only features (Experimentation, Advanced Paths, Advanced Permissions) aren’t included in the self-hosted community edition.
Is OpenPanel free to self-host?
Yes. OpenPanel’s self-hosted version is free under the AGPL-3.0 license, with the same features as its paid cloud tier and no event caps.
Which tool has more features, OpenPanel or PostHog?
PostHog, by a wide margin. It bundles analytics with session replay, feature flags, A/B testing, surveys, error tracking, and a data warehouse. OpenPanel stays focused on web and product analytics alone.
Can I switch from PostHog to OpenPanel later?
Yes, both are open source with exportable data, so there’s no proprietary lock-in preventing a migration either direction. The practical work is re-instrumenting your tracking calls and rebuilding dashboards and funnels in the new tool, not a technical barrier to leaving.
Does OpenPanel or PostHog need less server power?
OpenPanel. Its official manifest asks for roughly 3 GB of RAM as a floor across seven containers. PostHog’s official self-hosting guidance specifies 4 vCPU and 16 GB RAM as the baseline, due to running ClickHouse and Kafka together.
Do both tools avoid cookie consent banners?
OpenPanel does, by default, since it’s cookieless. PostHog uses a first-party cookie by default, which is still more privacy-friendly than third-party trackers but isn’t cookieless out of the box.
Last updated September 14, 2026
← All articles