Aeralis vs Microsoft Copilot for Outlook in 2026: Honest Comparison

TL;DR: Copilot for Outlook is sold to Microsoft 365 enterprises buying AI across the whole suite — Word, Excel, Teams, Outlook — for $30/user/month on top of their Microsoft 365 subscription. If that's you, it's a reasonable bundle. If you mainly want better email writing, you're paying a lot for features you won't use. Aeralis is $14/month on its own, works on both Gmail and Outlook, has a free tier, and adds style learning and multiple profiles Copilot doesn't.

Aeralis vs Copilot for Outlook: at a glance

	Aeralis	Copilot for Outlook
Price	Free tier + $14/mo Pro	$30/user/mo (+ Microsoft 365 Business Standard: $12.50/user/mo)
Effective monthly cost	$14	About $42.50
Billing	Monthly available	Annual commitment typically
Email platforms	Gmail + Outlook	Outlook only
Free tier	Yes, 15 emails/month	No
Style learning	Yes, forward 3 sent emails	No
Multiple profiles	Up to 10	No
Grounding tools	Context URLs, Search, Maps, Files	Microsoft Graph (Teams, docs, calendar)
Scope	Email writing	Full Microsoft 365 AI suite
AI across Word/Excel/Teams	No	Yes

These tools serve different buyers. Copilot is sold to enterprises; Aeralis is sold to individuals and small teams. Different shapes of decision.

When Copilot is the right call

You're already on Microsoft 365 Business Standard or higher. Copilot is an add-on — it's not sold standalone. If your org is on Microsoft 365 Business Basic or a personal Microsoft account, Copilot isn't available.

Starting at Business Standard ($12.50/user/month), you can layer Copilot on top at $30/user/month. Total: ~$42.50 per user per month.

You want AI across the Microsoft suite, not just email. This is Copilot's real selling point. Word AI for long documents, Excel AI for data analysis, PowerPoint AI for slides, Teams AI for meeting summaries and inbox across Teams. If your team lives in M365, $30/user/month is reasonable for AI across all of it.

Enterprise compliance matters. Copilot inherits Microsoft 365's enterprise compliance — data residency, DLP policies, audit logs. For regulated industries already on M365, that's real value.

When Aeralis is the right call

You're on Gmail. Copilot is Outlook-only. If your workflow is Gmail-primary, Copilot doesn't apply. Aeralis works on both Gmail (Workspace Add-on) and Outlook (Azure AD add-in).

Mixed Gmail/Outlook teams. Aeralis covers both platforms with one subscription. Copilot doesn't.

Email is the actual bottleneck, not documents. If your team's pain is "we write too many emails from scratch," paying $42.50/user/month for the whole Copilot suite is overkill. You're buying Word, Excel, PowerPoint, and Teams AI that you won't use daily.

Aeralis is $14/user/month for email specifically. On a 10-person team, that's $140/month vs $425/month for Copilot — about $3,400 a year saved.

Style learning matters. Copilot drafts are generic. No profile system, no way to teach it that your sales emails should sound warmer than your internal emails. Aeralis has explicit style learning per profile.

You want a free tier to start. Copilot has no free option. Aeralis has 15 emails/month free with no credit card.

Grounding

Copilot grounds on Microsoft Graph — your Teams messages, SharePoint documents, calendar. Useful if that's where your context lives.

Aeralis grounds on:

• Context URLs (up to 20 per profile) — any public URL
• Google Search — live web grounding
• Google Maps — location-based
• File Search (Business) — upload PDFs, docs, notes
• MCP servers (Business) — connect CRM, inventory, custom APIs

Aeralis's grounding is broader for public and third-party data. Copilot's is deeper within Microsoft's own ecosystem. Depends where your relevant context actually sits.

Pricing for a 10-person team

Option	Per user	Monthly total	Annual total
Microsoft 365 Copilot (add-on to Business Standard)	$30 + $12.50 = $42.50	$425	$5,100
Aeralis Pro	$14	$140	$1,680
Aeralis Team (3 base + 7 additional seats)	~$21 blended	$219	$2,628

For teams on Microsoft 365 Business Basic or personal Microsoft accounts, you'd need to upgrade to Business Standard first before adding Copilot. That pushes total cost higher.

Can you use both?

Yes, if it fits. If your org is on Microsoft 365 Business Standard with Copilot for Outlook-using roles, and also uses Gmail elsewhere (a side project, a Workspace-based department), Aeralis on Gmail plus Copilot on Outlook covers both.

In practice, most teams pick one tool based on where their primary email workflow lives.

Who should pick Copilot for Outlook

Your org is on Microsoft 365 Business Standard, Premium, or Enterprise. You want AI across Word, Excel, PowerPoint, Teams, and Outlook. Compliance requirements favor staying inside Microsoft. Microsoft Graph context (Teams, SharePoint, calendar) is central to your work. Outlook is your exclusive email platform. Budget isn't the primary concern.

Who should pick Aeralis

You're on Gmail, or a mixed Gmail/Outlook team. Email is your main AI pain point, not documents or meetings. Drafts that sound like you matter. You want lower per-user cost. A free tier is useful for testing. You don't need the rest of the Copilot suite.

Bottom line

If your organization is already all-in on Microsoft 365 Business Standard or higher, Copilot for Outlook is a reasonable add-on — you get AI across the whole suite for a premium price.

If you're outside that setup, or if email is specifically where you want AI help, Aeralis is roughly a third of the cost and more focused on the actual problem. Mixed Gmail/Outlook teams have a clean reason to pick Aeralis: it covers both, Copilot doesn't.

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