Side-by-side comparison · Productivity & Notes
Calendly vs Fathom vs Slack
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: Sales and customer-facing teams who want every call recorded and summarised without paying per seat to start.
Pick it if: Teams that want one place to talk, and that lose time catching up on channels and hunting for old decisions.
Calendly scores highest overall, but Fathom gives you more for your money. Which one is right comes down to what you value most.
Overview
| Attribute | Calendly | Fathom | Slack |
|---|---|---|---|
| In one line | Share a link and let people book a meeting with you, with AI notes and email scheduling. | Records your video calls and sends you a summary, action items and transcript. | Team chat with AI built in: catch-up summaries, answers from your chats and Slackbot. |
| Pricing model | Freemium | Freemium | Freemium |
| Starting price | $0 | $20/mo | $0 |
| Free plan | Yes | Yes | Yes |
| Works with Claude Code | Yes | Yes | Yes |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | Calendly | Fathom | Slack |
|---|---|---|---|
| Overall rating | 4.5Winner | 4.2 | 4.0 |
| Ease of useHow quickly someone non-technical gets value from it. | 5.0 | 4.5 | 4.5 |
| 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 | 3.5 | 4.0 |
| Value for moneyWhat you get for the price, including the free plan. | 4.0 | 4.5 | 3.5 |
| Speed & reliabilityHow fast it is and how often it falls over. | 4.5 | 4.0 | 4.0 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | Calendly | Fathom | Slack |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | Yes | – | Yes |
| Desktop app | No | Yes | Yes |
| Browser extension | Yes | – | No |
| API access | Yes | Yes | Yes |
| Teams & business | |||
| Team workspace | Yes | Yes | Yes |
| Enterprise plan or SSO | Yes | Yes | Yes |
| Connects to other apps | Yes | Yes | Yes |
| Open source or self-hosted | No | No | No |
| AI abilities | |||
| Works with your files | No | No | 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 | Yes |
| Learns your brand or style | – | No | Yes |
| Works in many languages | No | Yes | Yes |
| Capabilities score | 8/ 17 | 7/ 17 | 11/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Calendly | Fathom | Slack |
|---|---|---|---|
| Plans | Free $0 Trying it out with one type of meeting. | FreeOur pick Free Anyone who wants every call recorded without paying. | Free $0 Small teams trying Slack. |
StandardOur pick $10/seat/mo billed yearly ($12 monthly) Solo professionals booking clients. | Premium $20/mo, or $16/mo billed yearly One person who wants the fuller summaries every time. | Pro $7.25/user/mo billed yearly ($8.75 monthly) Small teams that want basic AI. | |
Standard Plus $18/seat/mo billed yearly ($24 monthly) Solo professionals who want AI meeting notes. | Team $19/user/mo, or $15/user/mo billed yearly Small teams sharing calls with each other. | Business+Our pick $15/user/mo billed yearly ($18 monthly) Teams that want the full AI set. | |
Teams $16/seat/mo billed yearly ($20 monthly) Sales and service teams sharing bookings. | Business $34/user/mo, or $25/user/mo billed yearly Sales teams living in a CRM. | Enterprise+ $45/user/mo billed yearly Large companies with many tools. | |
Teams Plus $24/seat/mo billed yearly ($32 monthly) Teams that want AI notes on every call. | Enterprise Custom Larger organisations needing SSO and rollout help. | ||
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. | Most people should simply use Free; it covers more than the paid tiers of its rivals. Only move to Team or Business when several people need to search each other's calls or you want notes landing in HubSpot or Salesforce without lifting a finger. | If your team already pays for Pro, try the basic AI first. Move to Business+ when you want AI search, the Slackbot agent and daily recaps, which is where the real time saving is. New teams get 50% off Pro or Business+ for 3 months if they upgrade in the first week. |
Key features
| Attribute | Calendly | Fathom | Slack |
|---|---|---|---|
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Pros and cons
| Attribute | Calendly | Fathom | Slack |
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Who each one is for
| Attribute | Calendly | Fathom | Slack |
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Questions people ask
Which is better, Calendly, Fathom or Slack?
Calendly scores highest overall in our ratings (Calendly 4.5/5, Fathom 4.2/5 and Slack 4.0/5). Calendly is best for letting clients book calls without emailing back and forth and taking payment when someone books. Fathom is best for recording sales and client calls and sharing call clips with the team. Slack is best for catching up on busy channels after time off and finding past decisions in your team's messages.
Which is cheaper, Calendly, Fathom or Slack?
Calendly: There's a free plan, and paid plans start at $0. Fathom: There's a free plan, and paid plans start at $20/mo. Slack: There's a free plan, and paid plans start at $0.
Which is easier to use, Calendly, Fathom or Slack?
Calendly rates highest for ease of use in our scores. Anyone who books calls with clients, prospects or candidates, from solo coaches to sales teams.
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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