Build vs. buy: when custom event tech makes sense (and when it doesn't)

Every few months, someone on an event team's Slack posts the question: "Should we just build our own?" It usually comes after a frustrating week with their current platform — a feature that doesn't exist, an integration that can't be done, a workflow that requires six workarounds.

The honest answer is: it depends. And anyone who tells you otherwise is selling something.

When buying makes sense

For most event teams, buying a platform is the right call. Not because building is impossible, but because the maths rarely works out.

You need standard event workflows. Registration, scheduling, speaker management, exhibitor portals, floor plans, attendee apps — these are solved problems. Thousands of events have shaped what these features need to do. Building them from scratch means rediscovering every edge case that existing platforms have already handled. Session conflicts when a speaker is double-booked. Timezone handling across multi-region events. Partial refunds on group registrations. These aren't glamorous problems, but they'll eat six months of development time.

You don't have a dedicated dev team for event tools. Building isn't just the initial development. It's the ongoing maintenance, bug fixes, feature requests, security patches, and infrastructure management. If your engineering team is building the software and then moving on to other projects, you'll end up with a tool that works for the event it was built for and slowly breaks for every event after that.

You want to focus on events, not software. This sounds obvious, but it's easy to underestimate. Running events is hard enough. Running events while also running a software product is two full-time jobs. Your team's energy should go into producing better events, not debugging why the registration form stopped sending confirmation emails.

When building makes sense

Sometimes buying genuinely isn't the right answer. Here's when custom development is worth the investment.

Your workflows are genuinely unique. Not "we do things slightly differently" unique — that's what configuration and custom fields are for. Genuinely unique, as in no platform on the market supports what you need. Some organisations have compliance requirements, approval chains, or data handling rules that no off-the-shelf tool can accommodate. If you've evaluated the major platforms and none of them can bend to fit your process, building might be the only option.

You need deep integration with proprietary systems. If your events are tightly coupled with proprietary internal systems — a custom-built membership database, a bespoke CRM, an industry-specific compliance platform — and those systems don't have standard APIs, you may need custom software that speaks directly to your infrastructure.

You have the engineering team to maintain it long-term. This is the qualifier that kills most "let's build it" conversations. Building event software isn't a project. It's a product. It needs a team that will maintain it, improve it, and keep it running for years. If you have that team and that commitment, building can absolutely work. If you're hoping to hire a contractor for three months and then coast, it won't.

The middle ground most teams miss

Here's the thing that rarely comes up in the build-vs-buy debate: you don't have to pick one or the other entirely.

The smarter approach for many teams is to buy a platform that handles the 80% — the standard workflows, the registration, the scheduling, the exhibitor management — and build custom for the 20% that's specific to your organisation.

This only works if the platform you buy has a real API. Not a "we have an API" page that covers three endpoints and hasn't been updated since 2023. A real API that gives you programmatic access to everything the platform does.

This is why we built ema as API-first. Every feature in ema is backed by a public API. The same API that powers the interface is available to your team. So you can use ema for the complex, already-solved problems — registration, scheduling, exhibitor compliance, floor plans — and build custom integrations, workflows, and tools on top for the parts that are specific to you.

Want to sync attendee data with your proprietary membership system? Use the API. Need a custom approval workflow that routes through your internal compliance tool? Build it on top of the API. Need to pull event data into a bespoke reporting dashboard your board requires? The data is there, in a documented, consistent format.

The question to actually ask

The useful question isn't "should we build or buy?" It's "what specifically do we need that doesn't exist, and how much of our workflow is truly custom?"

If the answer is "most of it" — and you have the engineering capacity — building makes sense. If the answer is "a few specific things" — find a platform with a proper API and build those specific things. If the answer is "honestly, nothing" — buy a platform, configure it well, and spend your time on the events themselves.

The worst outcome is building something you could have bought, then spending the next three years maintaining it instead of improving your events. The second worst outcome is buying a platform that can't be extended, then hacking around its limitations with spreadsheets and email.

The middle ground — a platform with a real API — avoids both.