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Microsoft 365 Copilot vs Mem.ai: Complete Comparison 2026

Choosing between Microsoft 365 Copilot and Mem.ai? We compare both tools across features, pricing, pros and cons to help you decide which is the better fit in 2026.

Microsoft 365 Copilot8.3

Microsoft · Productivity, Writing

Microsoft 365 Copilot embeds AI across Word, Excel, PowerPoint, Outlook and Teams to draft, analyse and summarise using your work data. It's the default AI layer for Microsoft-centric enterprises.

Mem.ai7.8

Mem · Productivity, Writing

Mem is an AI-native notes app that organises your knowledge automatically so you never have to file or tag manually. It surfaces related notes, answers questions across everything you have written, and acts as a personal knowledge assistant. Mem suits people who want a self-organising 'second brain'.

Key differences at a glance

  • •Microsoft 365 Copilot scores higher overall (8.3 vs 7.8).
  • •Mem.ai has a free tier; Microsoft 365 Copilot does not.
  • •Microsoft 365 Copilot leans on deep office integration.
  • •Mem.ai leans on no manual filing needed.

Side-by-side comparison

FeatureMicrosoft 365 CopilotMicrosoftMem.aiMem
Quality score8.3 / 107.8 / 10
Starting price$30/mo$10/mo
Free tierNoYes — Free tier available
API input price——
API output price——
Speed—Fast
Context window——
CategoriesProductivity, WritingProductivity, Writing
Key features
  • Drafting in Word and Outlook
  • Excel analysis and formulas
  • PowerPoint generation
  • Teams meeting recaps
  • Self-organising notes
  • AI chat across your knowledge
  • Automatic related-note surfacing
  • Smart search
Pros
  • + Deep Office integration
  • + Works on your real data
  • + Enterprise security
  • + No manual filing needed
  • + Great personal-knowledge Q&A
  • + Fast, frictionless capture
Cons
  • − Premium per-seat price
  • − Requires M365 ecosystem
  • − Less manual structure for some
  • − Smaller integration ecosystem

Microsoft 365 Copilot

Choose Microsoft 365 Copilot if you want deep office integration.

Mem.ai

Choose Mem.ai if you want no manual filing needed and a free tier to start.

Pricing comparison

Microsoft 365 Copilot
$30/mo
Mem.ai
$10/mo

The verdict

Overall, Microsoft 365 Copilot edges ahead with a quality score of 8.3 versus 7.8 for Mem.ai. Choose Microsoft 365 Copilot if you want deep office integration. That said, Mem.ai is the better pick when no manual filing needed matters most — so the right answer depends on your priorities and budget.

Try Microsoft 365 Copilot →Try Mem.ai →

Frequently asked questions

Q. Which is better, Microsoft 365 Copilot or Mem.ai?

On our scoring, Microsoft 365 Copilot edges ahead (8.3/10), but the right pick depends on your priorities and budget — see the breakdown above.

Q. Is Microsoft 365 Copilot or Mem.ai cheaper?

Mem.ai has a free tier, so it's cheaper to start. Microsoft 365 Copilot begins at $30/mo.

Q. Can I use Microsoft 365 Copilot and Mem.ai together?

Yes — many teams use more than one AI tool, picking Microsoft 365 Copilot for some tasks and Mem.ai for others where it's stronger.