Side-by-side comparison · Productivity & Notes
Calendly vs Heidi vs Todoist
Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.
Comparing 3 tools, the maximum.
At a glance
Pick it if: Anyone who books calls with clients, prospects or candidates, from solo coaches to sales teams.
Pick it if: GPs, specialists, psychologists and allied health practitioners who spend their evenings writing up notes.
Pick it if: Anyone who wants a dependable task list that is fast to use and stays out of the way.
Calendly scores highest overall, but Todoist gives you more for your money. Which one is right comes down to what you value most.
Overview
| Attribute | Calendly | Heidi | Todoist |
|---|---|---|---|
| In one line | Share a link and let people book a meeting with you, with AI notes and email scheduling. | AI medical scribe that listens to a consult and writes the notes and letters. | A simple to-do list that works everywhere and understands due dates like 'every Monday'. |
| Pricing model | Freemium | Freemium | Freemium |
| Starting price | $0 | Free | $7/mo |
| Free plan | Yes | Yes | Yes |
| Works with Claude Code | Yes | No | Yes |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | Calendly | Heidi | Todoist |
|---|---|---|---|
| Overall rating | 4.5Winner | 4.2 | 4.3 |
| Ease of useHow quickly someone non-technical gets value from it. | 5.0 | 4.5 | 5.0 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 4.5 | 4.5 | 4.0 |
| Output qualityHow good the results are before you fix them. | 4.5 | 4.0 | 3.5 |
| Value for moneyWhat you get for the price, including the free plan. | 4.0 | 4.0 | 4.5 |
| Speed & reliabilityHow fast it is and how often it falls over. | 4.5 | 4.0 | 4.5 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | Calendly | Heidi | Todoist |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | Yes | Yes | Yes |
| Desktop app | No | Yes | Yes |
| Browser extension | Yes | Yes | Yes |
| API access | Yes | – | Yes |
| Teams & business | |||
| Team workspace | Yes | Yes | Yes |
| Enterprise plan or SSO | Yes | Yes | No |
| Connects to other apps | Yes | Yes | Yes |
| Open source or self-hosted | No | No | No |
| AI abilities | |||
| Works with your files | No | Yes | Yes |
| Understands images | – | – | No |
| Makes images | No | No | No |
| Makes video | No | No | No |
| Writes code | No | No | No |
| Runs agents or automations | Yes | – | No |
| Learns your brand or style | – | Yes | No |
| Works in many languages | No | Yes | Yes |
| Capabilities score | 8/ 17 | 10/ 17 | 9/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Calendly | Heidi | Todoist |
|---|---|---|---|
| Plans | Free $0 Trying it out with one type of meeting. | Free Free A single clinician trying it on real consults. | Beginner Free Anyone with a simple list. |
StandardOur pick $10/seat/mo billed yearly ($12 monthly) Solo professionals booking clients. | ClinicianOur pick See website (14-day free trial) A clinician who uses it every day. | ProOur pick $7/mo, or $5/mo billed yearly Anyone who wants more projects and the calendar view. | |
Standard Plus $18/seat/mo billed yearly ($24 monthly) Solo professionals who want AI meeting notes. | Practice Custom Clinics with several practitioners. | Business $10/user/mo, or $8/user/mo billed yearly Small teams sharing a workspace. | |
Teams $16/seat/mo billed yearly ($20 monthly) Sales and service teams sharing bookings. | Enterprise Custom Health services and large groups. | ||
Teams Plus $24/seat/mo billed yearly ($32 monthly) Teams that want AI notes on every call. | |||
Enterprise From $15,000/yr Large companies with 50+ seats. | |||
| Which plan to pick | Standard covers most solo businesses. Only pay for Standard Plus if you don't already use a meeting notetaker like Fathom or Granola. Move to Teams when more than one person takes bookings. | Start on Free for a couple of weeks of real consults. If it saves you time every day, trial the Clinician plan; if you need notes to flow into your practice software or want one bill for the clinic, ask about Practice. | Beginner is fine until you hit the five-project wall. Pro on the yearly plan is the obvious move after that. Business is for teams who want a shared space; it is not a substitute for a real project tool. |
Key features
| Attribute | Calendly | Heidi | Todoist |
|---|---|---|---|
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Pros and cons
| Attribute | Calendly | Heidi | Todoist |
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Who each one is for
| Attribute | Calendly | Heidi | Todoist |
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Questions people ask
Which is better, Calendly, Heidi or Todoist?
Calendly scores highest overall in our ratings (Calendly 4.5/5, Heidi 4.2/5 and Todoist 4.3/5). Calendly is best for letting clients book calls without emailing back and forth and taking payment when someone books. Heidi is best for writing up consult notes and drafting referral and specialist letters. Todoist is best for personal task management and recurring reminders.
Which is cheaper, Calendly, Heidi or Todoist?
Calendly: There's a free plan, and paid plans start at $0. Heidi: It's free to use. Todoist: There's a free plan, and paid plans start at $7/mo.
How we compare
Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.
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