Productivity and SaaS tools
How much does it cost to build an app like Calendly?
By Nick McCandless, founder of EltherionUpdated
Short answer
Eltherion prices an MVP of an app like Calendly, a scheduling and booking SaaS, at $43k to $115k. A full platform with the features listed below runs $85k to $226k. These are Eltherion's own estimate ranges for building a comparable product, not what Calendly spent; your fixed price comes after a free scoping call, and small, tightly scoped work starts as low as $1,000.
An app like Calendly lets people share a booking link, shows visitors open times based on the host's real calendar, and books the meeting for both sides. As a SaaS product it also needs accounts, plans and billing so businesses can subscribe.
What an MVP of an app like Calendly costs, feature by feature
The first version below is the smallest product people could actually use. Core features are covered by the base price for a SaaS product; each outside service the app connects to, and each add-on, adds its own line.
| Line item | What it covers | Estimate |
|---|---|---|
| Core SaaS product (MVP) | Booking pages, Availability rules, Host dashboard | $35k to $95k |
| Google Calendar sync | Read busy times and write booked events | $2k to $5k |
| Microsoft Outlook calendar sync | The same for Microsoft 365 calendars | $2k to $5k |
| Email confirmations and reminders | Sent through an email delivery service | $2k to $5k |
| Subscription billing | Plans and card payments through a billing platform | $2k to $5k |
| Total | $43k to $115k |
- Booking pages: Public links where visitors pick a time.
- Availability rules: Working hours, buffers, minimum notice and time zones.
- Host dashboard: Event types, upcoming meetings, cancellations and reschedules.
What drives the cost of an app like Calendly
- Calendar sync is the core risk: time zones, recurring events and permission scopes need careful testing.
- Each extra calendar or video provider is another integration to build and maintain.
- Selling to businesses adds team features, company accounts and single sign-on.
Full platform: $85k to $226k
The full-platform tier prices the same app at full-platform scope ($63k to $171k for the core) plus these additions:
- Team scheduling: Round-robin and collective booking across a team (part of the full-platform core).
- Company accounts: Separate workspaces for each customer company with their own admins ($5k to $15k).
- Single sign-on: Enterprise login for larger customers ($5k to $10k).
- Video meeting links: Create meeting links in a video platform automatically ($2k to $5k).
- CRM sync: Push bookings into a CRM ($2k to $5k).
Most products should not build this tier up front. Ship the MVP, see what users actually do, and add the pieces that earn their place. Open the full-platform estimate in the calculator.
Running costs after launch
- Maintenance and small improvements: $8k to $21k a year for the MVP (18% of the build, a planning assumption).
- Hosting: about $7k a year (a planning estimate; heavy usage costs more).
- Three-year total for the MVP, build included: $88k to $199k.
- Card payments: Stripe's standard US rate is 2.9% + 30¢ per successful domestic card transaction (checked October 30, 2026); other providers price differently.
Each integration also has its provider's own usage fees (maps, messaging, video, AI models), which depend on how much the app is used.
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Frequently asked questions
- How much does it cost to build an app like Calendly?
- Eltherion prices an MVP of an app like Calendly, a scheduling and booking SaaS, at $43k to $115k, and a full platform at $85k to $226k. These are Eltherion's estimate ranges from its published pricing model; your fixed price comes after a free scoping call. Small, tightly scoped work starts as low as $1,000.
- Is it cheaper to use Calendly than build my own?
- For booking your own meetings, almost always. Building your own makes sense when scheduling is part of a product you sell, when you need booking rules an off-the-shelf tool can't express, or when booking has to live inside your own app and customer accounts.
- Which calendars should the first version support?
- Start with the calendar your customers actually use. Google Calendar and Microsoft Outlook cover most business users, and each one is a separate integration, so supporting only one at launch lowers the first build.
- Is this what Calendly spent to build its app?
- No. It is Eltherion's estimate for building a comparable first version today. It says nothing about what Calendly spent, and Eltherion is not affiliated with Calendly. A product at that company's scale has years of work and teams behind it that no MVP includes.
- How can I lower the cost?
- Launch with fewer integrations, one market and one platform, and leave the full-platform features until users ask for them. The adjustable calculator shows how each choice moves the range.
How we priced this
Every number on this page comes from Eltherion's software development cost calculator: a base range for the product type, multiplied by scope, plus a fixed range for each integration and add-on. The method is published on the cost methodology page. The feature list describes a typical comparable product; Eltherion is not affiliated with Calendly.