Mayday vs Callum: Which Should You Choose in 2026?
Choosing between Mayday and Callum comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Mayday
Calendar that works for you
Best for you if:
- • You need calendar features specifically
- • You need calendar that works for you
- • You want to start free and upgrade later
Callum
Your AI calendar assistant: manage your schedule with natural language and intelligent automation.
Best for you if:
- • You need something completely free
- • You need automation features specifically
- • Manages your calendar using natural language commands.
- • Automates scheduling, rescheduling, and meeting prep, especially for groups.
| At a Glance |  Callum | |
|---|---|---|
Price | Free + Paid | Free |
Best For | Calendar | Automation |
Rating | —/100 | —/100 |
| Feature | Mayday | Callum |
|---|---|---|
| Pricing Model | Freemium | Free |
| Editorial Score | — | — |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 162 | 192 |
| Categories | CalendarTime Tracking | AutomationWorkflow Automation |
Understanding the Differences
Both Mayday and Callum solve similar problems, but they approach them differently.Mayday positions itself as "calendar that works for you" while Callumfocuses on "your ai calendar assistant: manage your schedule with natural language and intelligent automation.". These differences matter depending on what you're trying to accomplish.
When to Choose Mayday
Mayday makes sense if you're looking for a budget-friendly option with a free tier solution.
When to Choose Callum
Callum is worth considering if you need a free tool.
Who Should Use What?
Bootstrapped or small team?
When every dollar counts, Mayday lets you get started without pulling out your credit card.
We'd pick: Mayday
Growing fast?
Your team doubled last quarter and you need tools that won't break when you add 50 more people. Callum is built for teams that are leveling up.
We'd pick: Callum
Enterprise with complex needs?
You need SSO, compliance certifications, and a support team that picks up the phone. Both have enterprise tiers—compare their security features.
We'd pick: Mayday
Still not sure? Answer these 3 questions
How much can you spend?
Zero budget? Callum won't cost you anything.
Do you care what other users think?
Both have similar review counts. Read a few before you commit.
Expert opinion or crowd wisdom?
Our team rated Mayday higher (/100). But the community has upvoted Callum more (192 votes). Pick your source of truth.
Key Takeaways
What Mayday Does Better
- Our recommendation for most use cases
Consider Callum If
- You need a completely free solution
- Its specific features better match your workflow
- You prefer its interface or design approach
The Bottom Line
If we had to pick one, we'd go with Mayday. But the honest answer is that "better" depends on your situation. Mayday scores higher in our analysis, but Callum might be the right choice if its specific strengths align with what you need most. Take advantage of free trials to test both before committing.
Frequently Asked Questions
Is Mayday or Callum better?
Based on our analysis, Mayday scores higher with high/100. Mayday isfreemium while Callum is free. The best choice depends on your specific needs and budget. We recommend testing both with free trials if available.
Can I switch from Mayday to Callum easily?
Migration difficulty varies. Check if both tools support data export/import in compatible formats. Some tools offer migration assistance or have integration partners who can help with the transition.
Do Mayday and Callum offer free trials?
Most software in this category offers free trials or free tiers. Mayday is freemium with a free tier.Callum is completely free. Visit their websites for current trial offers.