Compose AI vs Jace AI (2026): which should you pick?
As of Nov 13, 2026, Compose AI grades higher than Jace AI: 2.4 against 2.0 out of 4.0.
Checked Oct 9, 2026 and Nov 13, 2026 · graded Oct 10, 2026 and Nov 13, 2026 by ToolGPA
Compose AI grades higher on value for money, the free plan and ease of use. Jace AI grades higher on platforms. They get the same grade on features.
Price, platforms and features side by side. The table says where each price was read and when.
Jace AI
AI email agent with a web inbox for Gmail and Outlook
Free trial · from $20/mo
Which one is for you
Pick Compose AI if
- Fits if you write in Chrome all day and want sentences finished for you
- Works for people who want a free trial of AI autocomplete before paying anything
Look elsewhere if
- Skip it if you want an email app, because it has no inbox and works only as a Chrome add-on
- Not for you if you use Safari, Firefox or a phone, as no other browser or app is mentioned
- Watch out: the premium price isn't on the page we could read, so you can't tell what upgrading costs
- Watch out: the site footer shows 2024 and the homepage mentions no recent updates
Pick Jace AI if
- Fits if you handle a lot of email in Gmail or Outlook and want reply drafts written for you
- Works for people who want an incoming email to set something off in Slack, Notion or HubSpot
Look elsewhere if
- Skip it if you do most of your email on your phone, as there are no native apps yet
- Tight if you're on Plus, with 2 inboxes, 10,000 credits and 1 year of email history to chat with
- Pricey if a tidy inbox is all you want, at $20 a month on yearly billing or $25 monthly
- Watch out: higher Pro credit tiers cost more, at prices the page doesn't list
- Watch out: there's no free plan, and the 30-day money-back guarantee isn't a trial
How we grade them
| 2.4GPACompose AIFair | 2.0GPAJace AIFair | |
|---|---|---|
| Value for money | CThe extension is free, and a premium version exists, but its price sits behind a pricing page that wouldn't load. We can't say where it lands against the $8 email middle. | DPlus is $20 a month billed yearly, $25 monthly, against an $8 middle for this category and a dearest tenth that starts at $25. That buys 10,000 credits, 2 inboxes and chat over 1 year of history. Custom integrations and MCPs need Pro at $40, and the higher credit tiers aren't priced on the page. |
| Free plan and trial | BThe site says the plugin is free to use forever, with a premium version adding personalization features. No card or time limit is mentioned. | CNo free plan. Plus and Pro both start with a 7-day free trial you can cancel any time, though nothing on record says whether it asks for a card. The 30-day money-back guarantee isn't a trial. |
| Features | CAutocomplete, text generation and style personalization. It is a general writing helper, not an email client, so there is no inbox, folders or sending. | CFull reply drafts in your style, labels like Needs Reply applied for you, plain-language rules, and Flows that watch for matching mail then make calendar events or update Notion, Slack and HubSpot. But it runs on a Gmail or Outlook account rather than being one, and every job spends credits. |
| Ease of use | BNo store rating on record. Install the extension and start typing, with nothing to set up. | CNo rating on record. Drafts are saved back into Gmail or Outlook, but you connect accounts, describe your own labels and rules, and keep an eye on a monthly credit allowance. |
| Platforms and integrations | CChrome only, according to the site. It names LinkedIn, Facebook and Instagram, and no API. | BA web inbox and nothing native: no iOS or Android app yet, and the docs suggest keeping the Gmail or Outlook phone app alongside it. It connects to Slack, Google Drive, OneDrive and prebuilt MCP servers for Notion, Linear, GitHub and Salesforce. |
| Best for | autocomplete while you type in Chrome | email that sets off actions in your other tools |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Compose AI and Jace AI. How we grade
Where they differ
- Compose AI also covers text expansion and long-form writing.
- Jace AI also covers chat assistant, email client, inbox filtering, workflow automation and AI agents.
In commonAI features
At a glance
| Compose AI | Jace AI | |
|---|---|---|
| Pricing | Free plan | Free trial |
| Starts at | Not published | $20 per month, billed yearly ($25 billed monthly) |
| Free plan | The site says the Chrome plugin is free to use, with a premium version that adds advanced features. | None |
| Free trial | None listed | 7-day free trial on Plus and Pro, cancel anytime. The site also states a 30-day money-back guarantee. |
| Web | ||
| Browser extension | ||
| Made by | Compose AI, INC. | Zeta AI, Inc. |
| Price read from | Not confirmed | jace.ai |
| Checked | Nov 13, 2026 | Oct 9, 2026 |
Worth knowing
Compose AI
- The pricing page loads its plans with JavaScript and could not be read, so no premium price is listed.
- It is a Chrome plugin; the site mentions no other browsers or standalone apps.
- The site footer shows a 2024 copyright, and the homepage mentions no recent updates.
- It is a general writing tool, not an email client: it has no inbox of its own.
Jace AI
- There are no native iOS or Android apps yet; the docs suggest using the Gmail or Outlook mobile app alongside the web inbox.
- There is no free plan: Plus and Pro start with a 7-day free trial.
- Usage is metered in monthly credits: 10,000 on Plus and 20,000 on Pro, with higher Pro tiers at prices the page does not list.
- Plus is limited to 2 inboxes and 1 year of email history; custom integrations and MCPs are listed under Pro.
Key features
Compose AI
- Autocomplete in any text field
- Suggests the rest of a sentence where you type, across the sites and tools the extension is allowed to run on.
- Text generation
- Generates text from a prompt, with emails, documents and chat messages named as example uses.
- Writing-style personalization
- The vendor says it learns the user's voice and suggests phrases in that style; the FAQ ties some personalization features to the premium version.
- Use-case pages
- Site pages cover copywriting, blogging, recruiting and social media posts, including LinkedIn, Facebook and Instagram.
Jace AI
- AI email drafts
- Writes complete reply drafts in your style, using your signature and context from attachments, calendar and Slack. Drafts are saved to Gmail or Outlook, and follow-up drafts can be prepared after a delay.
- AI labels
- Built-in labels such as Needs Reply, Waiting, FYI, To Do and Promotion are applied automatically, and you can describe labels of your own for the AI to apply to matching mail.
- Rules
- Short plain-language instructions, such as which scheduling tool to use or who to CC, that Jace applies when it drafts and acts. Team owners can share a rule with the whole workspace.
- AI Flows
- A workflow watches for emails that match a description and then drafts replies, creates calendar events, searches the web or updates connected tools such as Notion, Slack and HubSpot.
- Chat with your inbox
- A chat assistant answers questions from your email history, 1 year on Plus and 3 years on Pro, and can fetch data, create documents and carry out tasks.
- Integrations and MCP servers
- Built-in connections to Slack, Google Drive and OneDrive, prebuilt MCP servers for tools such as Notion, Linear, GitHub and Salesforce, and support for most remote MCP servers.
Plans
Compose AI
Pricing could not be confirmed. See compose.ai.
Jace AI
Plus Plan$20
per month, billed yearly; $25 billed monthly
10,000 credits a month, up to 2 inboxes with unlimited calendars, chat with 1 year of email history, automatic drafts and labels.
Pro Plan$40
per month, billed yearly; $50 billed monthly
20,000 credits a month, up to 8 inboxes, chat with 3 years of history, priority support, custom integrations and MCPs. Higher credit tiers cost more.
Enterprise PlanCustom
For bigger teams: white-glove setup, usage-based pricing and a dedicated account manager, arranged with sales.
Ways to pay less
Compose AI
No public discounts listed.
Jace AI
- Annual discount
20% off with yearly billing
Billed yearly, Plus is $20 a month instead of $25 and Pro is $40 instead of $50. The pricing page labels this as 20% off and as saving $60 a year on Plus.
Common questions
Which is cheaper, Compose AI or Jace AI?
As of Nov 13, 2026, Compose AI has no price we could confirm, and Jace AI starts at $20 per month, billed yearly ($25 billed monthly).
Which has a free plan, Compose AI or Jace AI?
As of Nov 13, 2026, only Compose AI has a free plan. Jace AI does not, though it has a free trial.
Which platforms do Compose AI and Jace AI run on?
As of Nov 13, 2026, only Compose AI lists a browser extension and only Jace AI lists a web app. A platform missing from a listing is one its maker's pages did not mention.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.