What does it actually cost to add video calls to my app?

Video calls look deceptively simple from the outside. Two people tap a button and see each other. Under the hood, your app is managing real-time audio, video encoding, network routing, and connection fallbacks — all simultaneously, across every device and internet connection your users happen to have. Getting that right from scratch takes six to twelve months of specialized engineering work. Getting it wrong means frozen frames, dropped calls, and users who never come back.

The faster path is to plug in an API from a provider who has already solved the hard parts. The question is what that actually costs — and whether what Western agencies charge to wire it up makes any sense.

WebRTC is the open standard that nearly every video calling product runs on. It is the same technology behind Google Meet, WhatsApp video, and Zoom's browser client. The name stands for Web Real-Time Communication, but for a non-technical founder the useful way to think about it is: WebRTC is the rulebook, and a video API provider is the referee who enforces it so your developers do not have to.

Here is the problem WebRTC solves. Two users on different networks — one on home Wi-Fi, one on a mobile connection — cannot just send video directly to each other. Their internet providers do not allow it. To connect them, your app needs to coordinate a handshake through a server that figures out the best route between both devices. If a direct connection is possible, the video travels device-to-device. If not, it gets relayed through the provider's servers. That relay infrastructure is what you are paying for when you buy minutes from a video API.

Building that infrastructure yourself requires dedicated server capacity in multiple regions, connection fallback logic, encoding optimization, and a team that maintains it indefinitely. Twilio's engineering blog estimated in 2021 that building a production-grade WebRTC stack from scratch takes a team of four engineers eight to twelve months before it handles real traffic reliably. That is $400,000–$800,000 in engineering time before a single user makes a call.

The API path costs a fraction of that. You pay per participant per minute and let the provider handle everything underneath.

As of early 2023, four providers dominate the market: Twilio Video, Agora, Daily.co, and Vonage (formerly TokBox). Their pricing structures differ enough that choosing the wrong one for your usage pattern can double your monthly bill.

Agora prices by resolution tier: standard definition runs around $0.00099 per participant-minute, HD around $0.0028. If your app streams HD video between two participants for 60 minutes, that one session costs roughly $0.34 at Agora versus $0.48 at Twilio. Small difference at low volume, meaningful at scale.

The free tiers matter for early-stage products. Agora and Daily.co both offer 10,000 free participant-minutes per month. A one-on-one video call between two people counts as two participant-minutes per minute of call time. 10,000 participant-minutes is roughly 83 hours of two-person calls, enough to test with real users before you spend a dollar.

For most consumer apps, Daily.co's flat $0.004 rate simplifies financial planning. You know exactly what a user-hour of video costs: $0.24. No tier calculations, no resolution surprises. A Western agency will often quote Twilio by default, partly because Twilio has an aggressive sales team and partly because the engineer recommending it may not have done a recent cost comparison. That default choice costs more without delivering meaningfully better results for a typical startup.

Switching from one-on-one calls to group calls, three or more participants, changes the infrastructure math significantly. In a two-person call, each participant sends one video stream and receives one. Add a third person and each participant sends one stream but receives two. A group of six means each participant receives five simultaneous streams. The bandwidth and server processing multiply with every person added.

All four major providers handle this through routing servers that manage which streams go where. The cost shows up in your bill because every participant in a room is billed separately for every minute they are connected, regardless of whether they have their camera on.

A five-person call for 30 minutes generates 150 participant-minutes of billing. At Daily.co's $0.004 rate, that is $0.60. At Twilio's upper tier of $0.007, it is $1.05. Run fifty such calls per day for a month and the difference between providers is $675 per month, just from the rate differential.

Screen sharing adds a separate video stream to the room, billed as an additional participant by most providers. A one-on-one call with screen sharing active becomes a three-stream session. Budget an extra 30–50% on top of your base video cost if screen sharing will be a common feature.

For context: a telehealth app running 1,000 one-hour one-on-one sessions per month generates 120,000 participant-minutes. At Agora HD rates that is roughly $336 per month. At Twilio's standard rate it is $480–$840. Neither number is the budget-breaker founders often expect — the real cost is building the feature, not running it.

The API minutes are only one line item. Three others tend to surprise founders who only plan for the provider bill.

Recording storage is the most common hidden cost. If your app records calls, common in telehealth, education, and legal applications, providers charge separately for recording storage and processing. Twilio charges $0.01 per recorded minute plus $0.01 per minute for cloud storage. Daily.co charges $0.01 per recorded minute. A telehealth app that records all sessions doubles its video infrastructure bill the moment recording goes live.

Data transfer fees from your cloud host are the second item. Even though the video streams travel through the API provider's network, your application server handles signaling, the messages that set up and tear down each call. AWS and Google Cloud charge for outbound data from your servers. For most apps this runs $20–$80 per month at moderate scale, but it is worth including in projections.

Development and maintenance is the third and usually the largest. A Western agency typically charges $40,000–$60,000 to integrate a video API into an existing app, handling the UI, the call management logic, notification flows, error states, and testing across devices. An AI-native team delivers the same integration for $8,000–$12,000, because the repetitive parts of the implementation, connecting to the provider's SDK, building standard call screens, wiring up notifications, are the exact type of work where AI-assisted development cuts time by 60% or more. A senior engineer handles the decisions that are specific to your product; AI writes the first draft of everything standard.

Putting it together: a founder building a telehealth MVP with one-on-one video, session recording, and in-app notifications should budget $8,000–$12,000 to build the feature and $400–$900 per month in API and infrastructure costs at 1,000 sessions per month. That monthly number scales predictably — double the sessions, roughly double the API bill. There are no surprises, no server capacity decisions, and no infrastructure team required.

Western agencies charge the same $40,000–$60,000 and hand you the same Twilio integration. The API bills are identical on both sides of that comparison. What differs is the $32,000–$48,000 you either spent or kept.

Book a free discovery call with Timespade and walk through your video feature requirements. You will have a cost breakdown and a build timeline within 24 hours.