Saymail vs Compose AI: which AI email writer for Gmail?

Both turn an idea into an email faster than typing one from scratch. They take very different routes to get there. Here's an honest, feature-by-feature look so you can pick the one that fits how you actually work.

Last updated: 18 May 2026

Feature-by-feature comparison

Voice input — the biggest difference

Saymail is built around the microphone. Click it, describe the email out loud the way you'd leave a voicemail — messy, mid-sentence, in any order — and Saymail turns the transcript into a polished email. For people who think faster than they type, or non-native English speakers who'd rather speak in plain words and have the writing handled, this is the main reason to use Saymail.

Compose AI is text-only. It learns your writing voice from what you type and suggests autocompletions, which is a different (and very good) value proposition — but if you wanted to dictate, you'd need a separate tool like Wispr Flow.

Gmail integration

Both work inside Gmail. The interaction model is different.

Compose AI sits invisibly behind your typing and suggests completions as you write. Tab to accept, keep typing to ignore. It's elegant when you want help while still writing yourself, less useful when you don't want to write at all.

Saymail adds a green button to the Gmail compose toolbar. Click it, a panel opens, you brief the email (typing or speaking), pick a tone, hit Generate, and the polished email drops straight into the compose body. It's a "describe → done" loop rather than "type → assist".

Pricing and the free tier

Saymail is meaningfully cheaper than Compose AI. Pro is $6/month billed yearly versus Compose AI's $9.99/month yearly — that's about 40% less. On Saymail Pro, generated emails are unlimited. Compose AI's higher Ultimate tier ($44.99/month) unlocks unlimited words.

The free tiers measure different things. Compose AI gives you 1,500 words per month plus 10 email replies. Saymail gives you 10 generated emails per month — and unlike Compose AI, every tone and language is included on the free plan; the only thing Pro changes is lifting that monthly cap. Compose AI is more generous if you mostly use autocomplete; Saymail is more generous if you want full emails generated for you.

Tone selection

Saymail exposes five explicit tones — Formal, Casual, Friendly, Direct and Apologetic — as pills you click before generating. Switching from "Casual" to "Apologetic" changes the result noticeably; the AI is briefed with the exact intent of the tone, not just a style hint.

Compose AI takes the opposite approach: it learns your voice from what you write and suggests text that sounds like you. There's no explicit tone switch; the tone follows your usual writing. That's great for consistency in your own voice but less helpful when you want to deliberately sound different (e.g., a formal client mail versus a casual team Slack-style follow-up).

Languages

Saymail writes in English, German, French and Spanish, and can auto-detect the language of your input — all of it free on every plan.

Compose AI is primarily English. If you need to draft emails in German, French or Spanish, Saymail will give you better results out of the box.

Privacy and data handling

Saymail does not store the notes you type or the emails it generates — content is sent to the AI provider only to produce the result, not retained. Account data (email + display name from Google sign-in) and a per-month usage counter are stored. See the Saymail privacy policy for full details.

Compose AI's data handling is documented on their site. As with any AI writing tool, your inputs are processed by their backend; whether they're retained, used for training, or anonymized depends on their current policy — check it before sending sensitive content through either tool.

Where each one wins

When to pick which

Reach for Saymail when you sit down to write an email, know what you want to say, and just want it out of your head and into Gmail — especially if you'd rather speak the idea than type it, and especially if you write in more than one language.

Reach for Compose AI when your bottleneck isn't blank-page paralysis but typing speed, and when you write all day across many tools, not just Gmail. The autocomplete style fits people who already know what they want to write and just want fewer keystrokes.

They are not mutually exclusive. Some people use Compose AI for daily writing assistance and Saymail when they specifically need to dictate or polish a finished email.

Frequently asked questions

Is Saymail a free Compose AI alternative?

Saymail has a free tier (10 emails / month, with all tones and languages included). It's not a drop-in replacement for Compose AI — the workflow is different — but for the specific job of generating finished emails in Gmail, the free tier covers most casual users.

Does Compose AI have voice input?

No. Compose AI is text-only. If voice is your main reason for wanting an AI writing tool, Saymail or a dedicated voice tool like Wispr Flow are better fits.

Which is cheaper for unlimited use?

Saymail Pro is $6/month billed yearly and includes unlimited emails. Compose AI Premium is $9.99/month yearly but caps at 25,000 words/month; truly unlimited requires Ultimate at $44.99/month.

Can I use both at the same time?

Yes — they don't conflict. Compose AI does autocomplete while you type; Saymail's panel is something you actively open. Some users keep both installed for different moments.

Does Saymail work in Outlook?

Not at the moment — Saymail is Gmail-only. Compose AI has broader app coverage if you're on Outlook or other email clients.

Will my emails be used to train AI models?

Saymail does not retain the content of your emails. For Compose AI's training practices, check their current privacy policy.