Serendipity
Hosting
Install Serendipity in one click on our fast, reliable UK web hosting. Fully managed with free SSL, daily backups, and dedicated expert support.
What is Serendipity?
Serendipity, often shortened to s9y, is an open-source PHP weblog engine first released in 2003. It is licensed under the BSD licence and has been quietly maintained by a small core team for over twenty years. The platform runs on PHP and supports MySQL, MariaDB, PostgreSQL, or SQLite as its data store, which makes it unusually flexible for a self-hosted blog application.
The platform ships with a templated front end, threaded comments, trackback support, RSS feeds, a plug-in API, multiple author roles, scheduled posting, draft support, and category trees. The plug-in catalogue covers anti-spam, social sharing, related-post widgets, image galleries, and dozens of smaller integrations, all installable from inside the admin without FTP.
Serendipity was a serious WordPress alternative in the mid-2000s and remains a small but genuinely active project. It has never matched WordPress on plug-in count or theme variety. Where it earns its place is for blog owners who want a simpler codebase, a less plug-in-driven approach, and a platform that has stayed deliberately small. The 365i one-click installer includes Serendipity for the small but loyal user base who prefer this approach.
365i’s editorial review of Serendipity
Serendipity is one of those applications that I have a lot of respect for, even though I rarely recommend it to new customers any more. The reason I respect it is that the project has stayed small and disciplined for over twenty years. The reason I rarely recommend it is that WordPress won the blog platform race a long time ago, and starting a new blog on s9y in 2026 means swimming against the current. If you do, you've got reasons, and the reasons are usually good ones.
What works well: the codebase is small enough that you can read it. The plug-in API is clean. The database flexibility (MySQL, MariaDB, PostgreSQL or SQLite, all from one install) is unusual and useful. The default themes are plain but functional. Updates are infrequent compared with WordPress, but that's by design rather than neglect, and security advisories are handled properly when they do come up.
What's annoying: the theme catalogue is small, the plug-in catalogue is small, and the community is small. If you want a plug-in for some specific WordPress-style feature, it might exist or it might not. The default admin UI is functional but not elegant, and on mobile it's not a great experience. If you came from WordPress and you're expecting Gutenberg, you'll be disappointed. The Serendipity post editor is closer to old-school MarkItUp than to a modern block editor.
"Serendipity is the blog engine for people who want a blog engine, not a content management framework with a blog feature. It's small on purpose, it's stable on purpose, and the codebase is small enough to actually understand. That counts for a lot."
Mark McNeece, Founder, 365i Hosting
On hosting: Serendipity is happy on our shared hosting from £5.99/mo. It uses very little memory, the database footprint is tiny, and a typical install runs comfortably even when traffic spikes thanks to the autoscaling cloud platform we run on. PHP 8.5 is fine for current Serendipity releases, and MySQL 8 handles everything without strain. The plug-in cache directory wants to stay writeable, but that's standard.
One practical thing to know: Serendipity uses a different cache and templating model than WordPress. If you're moving from WordPress and you have a slow blog, you can't fix it with W3 Total Cache or LiteSpeed Cache plug-ins. The fix is in Serendipity's own settings, specifically the static cache plug-in and the Smarty template caching. Both are documented well, but you have to read the docs.
If you're starting a new blog in 2026, I'd be honest: pick WordPress unless you have a specific reason not to. If your reason is that you want a smaller codebase, you write your own theme tweaks, and you don't want to maintain forty plug-ins, then Serendipity is genuinely the right tool. We'll host it on shared, migrate from WordPress free of charge if you decide it's not for you, and we'll keep the install up to date as part of normal maintenance work if you hire us for that on top of hosting.
Why Host Serendipity with 365i?
Our web hosting is built for PHP applications like Serendipity. Every plan includes everything you need to launch and grow.
One-Click Installation
Install Serendipity with a single click from your control panel. No manual configuration, no FTP uploads, no database setup.
Free SSL Certificate
Every site gets a free SSL certificate, automatically configured and renewed. Keep your Serendipity installation secure from day one.
99.9%+ Uptime Track Record
Enterprise-grade data centres in the UK, US & Asia with redundant power, cooling, and network connectivity. Shared hosting runs on autoscaling cloud infrastructure with a 99.9%+ historical uptime record; Managed Cloud Servers target 99.99% uptime; our VPS products carry a contractual 99.99% network availability SLA with service credits.
Daily Backups
Automatic daily backups with easy one-click restore. Your Serendipity data is always safe and recoverable.
7-Day Expert Support
UK-based hosting specialists available 7 days a week including evenings, weekends, and bank holidays. Real people, real help.
SSD Storage
All plans run on fast SSD storage for snappy page loads and responsive admin panels. Serendipity performs at its best.
Where Serendipity Fits
Best for
Bloggers who want a small, disciplined codebase rather than a full content management framework. Owners coming from older s9y installs who prefer not to migrate. Technical writers and developers who like the BSD-licensed codebase, the multiple database options, and the small plug-in catalogue. Long-running personal blogs where stability matters more than feature growth.
Watch for
Small theme catalogue, small plug-in catalogue, small community. The default admin UI is functional but not great on mobile. Post editor is closer to MarkItUp than a modern block editor. Migrating from WordPress is doable but requires manual content cleanup because the database schemas differ. Updates ship infrequently, which is mostly fine but means new feature requests rarely land quickly.
Web Hosting for Serendipity
Get Serendipity up and running in minutes with our fast, reliable web hosting. Every plan includes one-click installation, free SSL, UK, US & Asia data centres, and dedicated expert support.
- 1 website
- 10 GB SSD storage
- Free SSL certificate
- 80+ 1-click installs
- Unlimited LVE resources
- Autoscaling cloud platform
- UK, US & Asia data centres
- 5 websites
- Unlimited SSD storage
- Free SSL certificate
- 80+ 1-click installs
- CDN included
-
Timeline Backup/Restore
Timeline Backup
- Website files and databases
- Daily snapshots, 30-day retention
- One-click file and database restore
- Everything above, plus email mailbox backups
- 60-day database retention
- Mailbox restore (to a temporary mailbox first, then sync back)
- Unlimited LVE resources
- Autoscaling cloud platform
- UK, US & Asia data centres
- 10 websites
- Unlimited SSD storage
- Free SSL certificate
- 80+ 1-click installs
- CDN included
-
Timeline Backup/Restore (Pro)
Timeline Backup
- Website files and databases
- Daily snapshots, 30-day retention
- One-click file and database restore
- Everything above, plus email mailbox backups
- 60-day database retention
- Mailbox restore (to a temporary mailbox first, then sync back)
- Unlimited LVE resources
- Autoscaling cloud platform
- UK, US & Asia data centres
All prices exclude VAT. No contract, cancel any time.
Need More Power for Serendipity?
For high-traffic sites, large catalogues, or mission-critical deployments, our fully managed cloud servers give Serendipity dedicated resources and enterprise-grade performance.
- Dedicated CPU, RAM & SSD storage
- 99.99% uptime
- Fully managed by our team
- Choose 365i, AWS, or Google Cloud
Servers
Servers
Servers
A Serendipity case from our books
A retired academic in Yorkshire joined us in 2024 with a Serendipity install he had run on a now-defunct academic hosting service since 2007. He blogs three times a week on regional history, has roughly 800 archived posts, around 4,200 monthly visits, and an active commenter community of about 60 regulars. His old host had finally pulled the plug and he had a 14-day window to move.
We migrated the install to our shared hosting at £5.99/mo, took the SQLite database across as-is rather than converting to MySQL (he preferred the simplicity), set PHP to 8.1 to match the version his theme was tested against, and configured the static cache plug-in to handle the traffic spike when one of his posts gets shared on a regional history forum. We also rewrote his .htaccess to preserve the original permalink structure so none of his backlinks broke. Total migration time was about seven working hours.
Site speed improved by roughly 52% on the home page and 38% on archive pages. He's saved roughly £80/yr on hosting versus his old academic plan. Comment notifications work cleanly via cron, and his backups are running daily.
What we would tell anyone in the same spot: don't change the platform if it's working. Move it to somewhere that knows what s9y needs and keep writing.
Anonymised at the client's request. Industry, scale, and timeline preserved.
What we look for in blogging hosting
Hosting a blog well is mostly about three things we end up tuning for almost every site: PHP memory high enough to handle a busy media library, an opcache configuration that survives a publish-and-purge cycle, and a sensible image-optimisation policy so that 4MB phone uploads do not become 4MB page weight. We give all of that out of the box on our web hosting plans, plus a real server cron rather than the in-application scheduler so timed posts actually fire when you want them.
More applications you can install on 365i hosting
Beyond Blogging, our one-click installer covers 79 open-source PHP applications across 27 categories. A small selection from across the catalogue:
Serendipity Hosting FAQ
Common questions we hear from people running Serendipity on our hosting.
Serendipity runs on PHP 7.4 or later (PHP 8.1+ recommended for current releases) plus a database. It supports MySQL, MariaDB, PostgreSQL, or SQLite, which is unusually flexible. Our shared hosting includes PHP 8.5, MySQL 8, and 256MB PHP memory, all of which exceed Serendipity's needs comfortably. Cron access is included, which Serendipity uses for scheduled posts and notification handling.
Yes. Serendipity is in our application installer alongside the rest of the 365i catalogue. The installer creates the database, places the files, and walks you through the initial blog configuration. End to end, allow about 15 minutes for a fresh install. The default theme is plain but functional. You'll likely want to install a community theme through the plug-in directory once the basic setup is done.
Serendipity is much smaller in every dimension: smaller codebase, smaller plug-in catalogue, smaller theme selection, smaller community. That smallness is the appeal for some owners. WordPress is the right pick for almost any new blog in 2026 because of the ecosystem. Serendipity is the right pick when you specifically want a blog engine that has stayed small and disciplined, where you can read the code, and where you don't want to manage forty plug-ins. Different tools, different jobs.
We provide hosting-layer support 7 days a week including evenings, weekends, and bank holidays. That covers PHP, MySQL or SQLite, cron, SSL, file permissions, email, DNS, backups, and migrations. We don't write custom Serendipity plug-ins or build themes for you, that's development or design work. The Serendipity community forums and project site are the right place for application-specific bugs and theme questions. Datacentre infrastructure is monitored 24/7.
Yes, free of charge. Send us your current host's FTP details and a database export (or the SQLite file if you're using SQLite) and we'll move the install across. We'll preserve your permalink structure to keep backlinks working, set up SSL, and test login and comment posting before we cut DNS over. Most Serendipity migrations take two to five working hours. If you've heavily customised your theme, we'll keep your modifications intact during the move.
Honestly, only if you have a specific reason. The reasons that work: you want a smaller codebase you can read, you prefer BSD licensing, you like the multi-database flexibility, or you specifically don't want WordPress for ideological or operational reasons. The reasons that don't hold up: you think it'll be faster (modern WordPress with proper caching is faster) or that it'll be lower-maintenance (it's about the same). For most new bloggers, WordPress is the more practical pick.
Ready to Host Serendipity?
Get started with Serendipity on our fast UK web hosting. One-click installation, free SSL, and dedicated expert support included.