TL;DR: There are three options, not two. Build on raw WebRTC, buy a video call SDK and build the interface, or skip the interface entirely with a hosted meeting API. Most teams compare only the first two and pick the most expensive path for their actual needs. Decide by asking whether the video interface is something your users will pay for.
Build-vs-buy sounds like a binary. For video it is not, and framing it that way is how teams end up with the wrong answer.
The usual debate runs between building on WebRTC and buying a video call SDK. Both options assume you will design, build, and maintain the call interface. For a large share of products that assumption is simply wrong, and nobody checked it.
If meetings support a workflow rather than being the product, a third option exists that removes the interface work entirely. It is usually the cheapest path and it is the one most often skipped, because it never appears in an SDK comparison table.
This guide lays out all three paths, what each genuinely costs, and a decision framework you can run in an afternoon.
A video call SDK is a client library you embed in your web or mobile application that connects to a vendor's media infrastructure. It gives you audio and video streams plus connection handling, and leaves the interface to you. You build participant layout, controls, and call states yourself.
The distinction that matters is where the video appears. An SDK renders video inside your application, so the experience is entirely yours to design. A hosted meeting API returns a join URL, so the video appears in the vendor’s interface instead.
That single difference drives most of the cost gap between the options, because interfaces are where the ongoing engineering time goes.
The three paths, and what each really costs
| Build on WebRTC | Buy an SDK | Hosted meeting API | |
|---|---|---|---|
| You build | Servers and interface | Interface only | Neither |
| Time to production | Many months | Weeks to months | Days |
| Ongoing burden | Very high | Moderate and permanent | Low |
| Branding control | Total | Total | Vendor look or white-label |
| Specialist staff | Required | Helpful | Not needed |
The column teams underestimate is ongoing burden for the SDK path. Buying an SDK removes the infrastructure problem permanently, which is genuinely valuable. It does not remove the interface problem, and the interface is what breaks when a browser updates, when a device rotates, when someone joins from a five year old Android phone.
Interface maintenance is not a project with an end date. It is a permanent line on your engineering budget, and it should be modelled that way rather than as a one-off build cost.
Should you build or buy a video call SDK?
Ask whether users would pay more for a video interface you designed. If yes, buy an SDK and build the interface. If no, use a hosted meeting API and spend that engineering time on the part of your product people actually pay for. Build on raw WebRTC only for genuine technical or regulatory reasons.
That question is deliberately blunt because it cuts through most of the debate. A telehealth product where the consultation room is the clinical experience should own its interface. A recruitment platform that occasionally runs interviews should not.
Four follow-up questions confirm the answer.
- Does the call need custom elements no vendor interface can show, such as live clinical data or a shared editing surface?
- Would sending users into a vendor-branded window damage trust in your product?
- Do you have engineers available to own a video interface permanently, not just to build it once?
- Is real-time video a differentiator you compete on, or a feature you need to have?
Mostly yes means buy an SDK. Mostly no means a hosted meeting API, and the honest saving is large. You skip interface design, cross-browser testing, mobile behaviour, and the permanent maintenance that follows.
Convay takes the third path. It does not ship a client SDK for rendering video inside your own application. It exposes a meeting API that returns join URLs, with white-label options for organisations that need the experience to carry their own branding. If you need video inside your React component, an SDK vendor is the right choice and you should look there. If you need meetings attached to a workflow you already own, the API path is faster and materially cheaper to run.
What buyers forget to evaluate
Three factors decide long-term satisfaction and almost never appear in the initial comparison.
Compliance posture. If you operate in a regulated sector, deployment options matter more than features. Ask about on-premise deployment in the first conversation, because it eliminates most vendors immediately and you want to know early.
Cost shape at scale. SDK vendors typically bill participant minutes, so costs rise with every attendee. Platform pricing usually does not. Model both at three times your expected volume, because the cheaper option at launch is frequently the expensive one a year later.
Access control depth. Ask how a session stops an unauthorised person from joining. Good answers include per-user join links, authenticated-only entry, and role separation between host and participant. Encryption alone is not access control, and the two are often conflated in vendor materials.
Conclusion
Three takeaways.
There are three paths, not two. Comparing only build and SDK hides the option most products should choose.
Interface maintenance is permanent. Budget it as an ongoing cost, not a one-time build.
Ask the paying question. If users would not pay extra for an interface you designed, do not build one.
Frequently Asked Questions
A video call SDK is a client library you embed in your web or mobile application that connects to a vendor’s media infrastructure. It provides audio and video streams and connection handling, while you build the participant layout, controls, and call states yourself. Video renders inside your own application rather than a vendor window.
Build on raw WebRTC only when you have a genuine technical or regulatory reason and real-time media expertise on staff. Buy an SDK when the video interface is part of what users pay for. If meetings simply support a workflow you already own, a hosted meeting API is usually faster and cheaper than either.
An SDK renders video inside your application and you design the interface. A meeting API returns a join URL, so users enter the vendor’s meeting interface and you build no call interface at all. The SDK gives total branding control at the cost of permanent interface maintenance.
A first working version on top of an SDK usually takes weeks. Reaching production quality takes longer, because participant layout, connection states, device permissions, mobile behaviour, and cross-browser differences all need handling. The work does not end at launch, since browser and device updates require ongoing maintenance.
Often yes, through white-label options that apply your branding to the meeting experience. It is not the same as total interface control, since the layout remains the vendor’s. For organisations that want a branded experience without owning a video client, white-label deployment is usually the practical middle ground.
Related guides
- Start with the complete video conferencing API guide
- Go deeper on evaluating and implementing an SDK
- Review the three embedding models before committing
- Understand what raw WebRTC would require
Not sure which of the three paths fits your product?
Describe how meetings sit inside your product and what your compliance constraints are. We will tell you honestly whether a hosted API fits, or whether you need an SDK vendor instead.
