Proprietary SaaS tools can cost growing businesses £50,000–£200,000/year for the same functionality available free in self-hosted open-source alternatives. With modern Docker-based deployment and platforms like Railway, Coolify, or Caprover, self-hosting has become dramatically simpler. This directory maps every major paid SaaS category to its best open-source alternative.
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Self-Hosting: What You Need to Know
Self-hosting has real costs beyond the tool
Server costs (£20–£200/month depending on scale), maintenance time (1–4 hours/month per tool), backup management, security patching, and on-call responsibility - these are the true costs of self-hosting. Compare the total honestly against the SaaS subscription.
- 1
Choose a hosting strategy
For most teams: Railway ($5+/month) or Hetzner VPS (€3.79+/month) for cost-effectiveness. Hetzner gives the best raw compute/price ratio in Europe. Use a VPS for full control, Railway for simplicity.
- 2
Use Docker Compose for deployment
Almost every major open-source tool ships with a docker-compose.yml. This is the simplest way to self-host. Store compose files in a private GitHub repo for version control.
- 3
Set up automated backups from day one
Use restic + Backblaze B2 (£5/TB/month) or pgdump to S3-compatible storage. Test restores monthly. Data loss while self-hosting will happen eventually without backups.
- 4
Use Caddy or Traefik as a reverse proxy
Both auto-provision Let's Encrypt SSL certificates. Caddy has simpler configuration; Traefik is better for dynamic container environments.
Productivity & Collaboration Alternatives
| Paid Tool | Open-Source Alternative | GitHub Stars | Docker? | Best Self-Host Platform |
|---|---|---|---|---|
| Notion | AppFlowy (appflowy.io) | 50k+ | Yes | Railway or self-hosted VPS |
| Confluence | Outline (getoutline.com) | 25k+ | Yes | Railway - has official one-click deploy |
| Jira | Plane (plane.so) | 25k+ | Yes | Coolify on Hetzner VPS |
| Slack | Mattermost (mattermost.com) | 28k+ | Yes | Hetzner VPS + Caddy reverse proxy |
| Zoom | Jitsi Meet (jitsi.org) | 22k+ | Yes | Self-hosted works well for <50 participants |
| Calendly | Cal.com (cal.com) | 30k+ | Yes | Railway (official integration) |
| Typeform | Formbricks (formbricks.com) | 8k+ | Yes | Self-hosted or cloud version available |
Notion
- Open-Source Alternative
- AppFlowy (appflowy.io)
- GitHub Stars
- 50k+
- Docker?
- Yes
- Best Self-Host Platform
- Railway or self-hosted VPS
Confluence
- Open-Source Alternative
- Outline (getoutline.com)
- GitHub Stars
- 25k+
- Docker?
- Yes
- Best Self-Host Platform
- Railway - has official one-click deploy
Jira
- Open-Source Alternative
- Plane (plane.so)
- GitHub Stars
- 25k+
- Docker?
- Yes
- Best Self-Host Platform
- Coolify on Hetzner VPS
Slack
- Open-Source Alternative
- Mattermost (mattermost.com)
- GitHub Stars
- 28k+
- Docker?
- Yes
- Best Self-Host Platform
- Hetzner VPS + Caddy reverse proxy
Zoom
- Open-Source Alternative
- Jitsi Meet (jitsi.org)
- GitHub Stars
- 22k+
- Docker?
- Yes
- Best Self-Host Platform
- Self-hosted works well for <50 participants
Calendly
- Open-Source Alternative
- Cal.com (cal.com)
- GitHub Stars
- 30k+
- Docker?
- Yes
- Best Self-Host Platform
- Railway (official integration)
Typeform
- Open-Source Alternative
- Formbricks (formbricks.com)
- GitHub Stars
- 8k+
- Docker?
- Yes
- Best Self-Host Platform
- Self-hosted or cloud version available
Analytics & Monitoring Alternatives
| Paid Tool | Open-Source Alternative | GDPR Friendly? | Notes |
|---|---|---|---|
| Google Analytics | Plausible (plausible.io) | Yes - no cookies, no GDPR consent needed | Best GA alternative; extremely lightweight. Cloud plan: $9/month. Self-host free. |
| Google Analytics | Umami (umami.is) | Yes - cookieless option | Free self-hosted; Vercel deploy in one click. Slightly less polished than Plausible. |
| Mixpanel / Amplitude | PostHog (posthog.com) | Yes (self-hosted) | Best full-product analytics platform (events, funnels, session recording, A/B tests). 1M events/month free cloud. |
| Datadog | Grafana + Prometheus + Loki | Yes | The OSS observability stack. Higher setup cost but zero licensing fees at scale. |
| Sentry (paid tiers) | GlitchTip (glitchtip.com) | Yes | Sentry-compatible API. Simpler feature set but covers most error tracking needs. |
Google Analytics
- Open-Source Alternative
- Plausible (plausible.io)
- GDPR Friendly?
- Yes - no cookies, no GDPR consent needed
- Notes
- Best GA alternative; extremely lightweight. Cloud plan: $9/month. Self-host free.
Google Analytics
- Open-Source Alternative
- Umami (umami.is)
- GDPR Friendly?
- Yes - cookieless option
- Notes
- Free self-hosted; Vercel deploy in one click. Slightly less polished than Plausible.
Mixpanel / Amplitude
- Open-Source Alternative
- PostHog (posthog.com)
- GDPR Friendly?
- Yes (self-hosted)
- Notes
- Best full-product analytics platform (events, funnels, session recording, A/B tests). 1M events/month free cloud.
Datadog
- Open-Source Alternative
- Grafana + Prometheus + Loki
- GDPR Friendly?
- Yes
- Notes
- The OSS observability stack. Higher setup cost but zero licensing fees at scale.
Sentry (paid tiers)
- Open-Source Alternative
- GlitchTip (glitchtip.com)
- GDPR Friendly?
- Yes
- Notes
- Sentry-compatible API. Simpler feature set but covers most error tracking needs.
Development Infrastructure Alternatives
| Paid Tool | Open-Source Alternative | Best For |
|---|---|---|
| GitHub (private repos/Actions) | Gitea or Forgejo | Organisations needing full-source control with CI/CD, self-hosted, fully GDPR-compliant |
| Vercel | Coolify (coolify.io) | Self-hosted Vercel-like PaaS on your own VPS. Supports Next.js, Docker, databases. |
| Heroku | Dokku (dokku.com) | Single-server Heroku experience on a £5/month Hetzner or DigitalOcean VPS |
| HashiCorp Vault (Enterprise) | Infisical (infisical.com) | Secrets management with developer-friendly UI. Self-host free, or cloud plan. |
| LaunchDarkly | Flagsmith (flagsmith.com) | Feature flags and remote config. Self-hosted free, cloud from $45/month. |
GitHub (private repos/Actions)
- Open-Source Alternative
- Gitea or Forgejo
- Best For
- Organisations needing full-source control with CI/CD, self-hosted, fully GDPR-compliant
Vercel
- Open-Source Alternative
- Coolify (coolify.io)
- Best For
- Self-hosted Vercel-like PaaS on your own VPS. Supports Next.js, Docker, databases.
Heroku
- Open-Source Alternative
- Dokku (dokku.com)
- Best For
- Single-server Heroku experience on a £5/month Hetzner or DigitalOcean VPS
HashiCorp Vault (Enterprise)
- Open-Source Alternative
- Infisical (infisical.com)
- Best For
- Secrets management with developer-friendly UI. Self-host free, or cloud plan.
LaunchDarkly
- Open-Source Alternative
- Flagsmith (flagsmith.com)
- Best For
- Feature flags and remote config. Self-hosted free, cloud from $45/month.
What’s next?