Aeralis vs Jace AI in 2026: Honest Comparison for Gmail Users

TL;DR: Aeralis is built to write email. Jace is built to run your inbox. If that distinction makes sense to you, the rest of this post is just confirmation. Aeralis costs $14/month (with a free tier) and lives inside Gmail as a sidebar add-on. Jace costs $20–$40/month and runs as a separate web app with Slack integration, smart rules, and a chat-style inbox assistant. Pick Aeralis if email writing is the bottleneck. Pick Jace if your bottleneck is inbox chaos across email and Slack.

Aeralis vs Jace AI: at a glance

	Aeralis	Jace AI
Starting price	Free (15 emails/mo)	$20/month (7-day trial)
Unlimited plan	$14/month (Pro)	$20/month (Individual)
Billing	Monthly on every tier	Monthly available
Free tier	Yes, 15 emails/month	No, trial only
Where it lives	Inside Gmail (Workspace Add-on)	Separate web app
Style learning	Yes, forward 3 sent emails	Limited
Multiple profiles	Up to 10	No
Grounding tools	Context URLs, Google Search, Maps, File Search	None
Slack integration	No	Yes
HubSpot integration	No	Yes (Professional tier)
Inbox rules / labels	No	Yes
Meeting notes	No	No
Outlook support	Yes	No

The useful mental model: Aeralis is a scalpel. Jace is a Swiss Army knife.

Pricing

Jace's Individual tier is $20/month, or $240 a year. Professional is $40/month. You do get monthly billing without an annual lock-in, which is genuinely nice.

Aeralis starts free. Fifteen emails a month, no credit card. Once you outgrow that, Pro is $14/month and unlimited. Business is $29/month if you need Knowledge uploads or unlimited profiles.

For a solo user, Aeralis works out about 30% cheaper than Jace. The free tier also means you can actually try it without committing, which Jace doesn't offer.

Where the tool lives matters more than you think

Aeralis is a Google Workspace Add-on. It shows up as a small icon in your Gmail sidebar, the same place you'd see Google Calendar or Tasks. You click it, pick a profile, click generate. You never leave Gmail. Mobile works the same way inside the Gmail app.

Jace is a web app. It syncs with Gmail, but you do your composing in Jace's interface. In practice, this means you have Jace open in one tab and Gmail in another, and you're switching between them several times an hour.

Neither workflow is wrong — some people love having a unified dashboard — but if your goal is just "write this reply faster," context-switching is pure friction.

Style learning: the thing Aeralis does explicitly

Jace claims to adapt to your writing style over time. In practice, most users say drafts feel a bit generic for the first few weeks. There's no explicit training, no way to speed it up, and the documentation is light on how it actually works.

Aeralis is more deliberate. Every profile gets its own inbound email address. Forward three of your sent emails to that address and the AI picks up your greetings, your sign-offs, how long your sentences tend to run. Forward more over time and it keeps getting sharper.

For anyone who cares about drafts actually sounding like them — sales reps, recruiters, founders writing to investors — this is a real functional difference.

Multiple profiles

Aeralis has them. Jace doesn't.

The practical use: separate profiles for different audiences. Client A vs Client B vs internal team vs sales outreach. Each profile has its own learned style, its own context (like a client's pricing page), its own tone. You switch profiles in one click when you switch contexts.

If you write to two or more meaningfully different audiences, this is genuinely valuable. If all your email sounds roughly the same regardless of who you're writing to, you don't need it.

Grounding: where the AI can look things up

Aeralis includes grounding on every paid plan:

• Context URLs — up to 20 per profile, so drafts can reference your pricing page, your FAQ, a help doc
• Google Search — live web grounding for recent information
• Google Maps — location-based grounding for hospitality, real estate, field work
• File Search (Business) — upload PDFs and docs, the AI cites them
• MCP servers (Business) — connect CRM, inventory, custom APIs

Jace has none of this. Its strength is cross-channel workflow, not drafting emails that cite real sources.

If your emails need to pull in real information — prices, policies, locations, document content — Aeralis has a clear edge.

What Jace does that Aeralis doesn't

Being honest about this: Aeralis is intentionally narrow. If you want features beyond writing, Jace has more of them.

• AI inbox labels that auto-categorize incoming mail
• Smart rules for triage (auto-archive, auto-reply templates)
• Slack integration for cross-channel workflows
• HubSpot integration (Professional tier) for CRM sync
• "Chief of Staff" chat — natural language queries across your inbox

If your email problem is "I have too much stuff coming in and I can't triage it," Jace will help with that in ways Aeralis won't. Aeralis has no inbox automation at all.

Privacy

Aeralis processes email content in real time and doesn't store it. Forwarded style samples are kept as aggregate signals, not raw content. No inbox scanning. For regulated industries and privacy-sensitive teams, this is a meaningful design choice.

Jace stores emails on its servers to enable its features. The privacy policy allows opt-out for model training, but the baseline is that your email content sits on their infrastructure. Read the policy yourself if this matters to you.

Who should pick Aeralis

Writing is the bottleneck. You live in Gmail and don't want a second tab open all day. You care about drafts that sound like you rather than generic AI output. You write to multiple audiences. You want to ground emails in real data. You value monthly billing and a free tier.

Who should pick Jace AI

Your problem is wider than writing. You process 100+ emails a day and want AI-powered triage. You live in Slack too and want both channels connected. You use HubSpot and want CRM activity auto-logged. You specifically want a chat-style interface for querying your inbox.

Switching from Jace to Aeralis

Install Aeralis from the Google Workspace Marketplace. Takes about two minutes. Create profiles for each context you currently use Jace for. Forward three sent emails per profile to activate style learning. Test alongside Jace for a week — both can coexist. Cancel Jace once you've confirmed Aeralis does what you need.

No migration required. Aeralis runs on top of your Gmail, so you don't lose labels, filters, or anything else.

Switching from Aeralis to Jace

Less common. But if it's the right call for you: sign up for Jace, connect your Gmail, rebuild any writing patterns in Jace's format. Uninstall the Aeralis add-on. Again, no Gmail data is touched.

Both tools are low-risk to try.

Bottom line

Different shapes of tool. Aeralis is better at email writing specifically. Jace is broader but doesn't do any one thing as deeply. If you're writing a lot of email and want drafts in your voice, Aeralis is cheaper, faster, and more focused. If your inbox is chaotic across multiple channels, Jace's breadth will help more than Aeralis's depth.

Related reading

• 7 Best Jace AI Alternatives in 2026
• Aeralis vs Fyxer AI
• Jace AI vs Fyxer AI
• AI Email Tools Comparison