AI Email Tool Transparency Matrix (2026)
How 11 AI email tools handle the stuff buyers actually get burned on later: pricing visibility, real free tiers, billing terms, privacy stance, and how hard the vendor makes it to evaluate. We skip feature comparisons here. Features shift every quarter; this stuff usually doesn't.
TL;DR
Out of 11 tools, only Aeralis, Inbox Zero, Shortwave, and Gmail Help me write get all three basics right: published pricing, a real free tier, and monthly billing. The rest miss on at least one. Serif and Superhuman won't let you evaluate without a sales call or a premium commitment. Fyxer advertises monthly rates that you can only get annually. The matrix below has the specifics.
| Criterion | Aeralis | Fyxer AI | Jace AI | Superhuman | Shortwave | Inbox Zero | Serif AI | Perplexity Email Assistant | Gmail Help me write | ChatGPT | Microsoft Copilot for Outlook |
|---|---|---|---|---|---|---|---|---|---|---|---|
Public pricing Can you see the price before talking to sales? | Yes | Yes | Yes | Yes | Yes | Partial (sales call) | Partial (sales call) | Yes | Yes | Yes | Yes |
Free tier Real free plan you can use indefinitely, not a trial. | Yes | Trial only | Trial only | No | Yes | Trial only | Trial only | No | No | Yes | No |
Starting price Cheapest non-free tier in monthly terms. | $14/mo | $22.5/mo | $20/mo | $30/mo | $9/mo | $18/mo | Contact sales | $200/mo | $14/mo | $20/mo | $30/mo |
Monthly billing Can you pay month-to-month without annual commitment? | Yes | Annual only | Yes | Yes | Yes | Yes | Custom | Yes | Yes | Yes | Annual only |
Credit card to evaluate Do you have to enter a card just to try it? | No | Usually yes | Usually yes | N/A | No | Usually yes | Usually yes | N/A | N/A | No | N/A |
Privacy stance How does the tool handle your email content? | Real-time, not stored | Stored, policy opaque | Stored, policy opaque | Stored, opt-out available | Stored, opt-out available | Stored, policy opaque | Stored, policy opaque | Stored, policy opaque | Stored, policy opaque | Stored, opt-out available | Stored, opt-out available |
Style learning Does it learn your voice automatically? | Yes | Yes | Limited | Limited | Limited | No | No | Limited | No | Limited | Limited |
Integration model How does it fit into your email workflow? | Gmail add-on (native) | Chrome extension | Separate app | Separate app | Separate app | Separate app | Email delegation | Separate app | Built into Gmail/Outlook | Separate app | Built into Gmail/Outlook |
Setup time to first value How long from install to your first useful output? | ~2 minutes | ~5 minutes | ~10–30 minutes | ~10–30 minutes | ~10–30 minutes | ~10–30 minutes | Sales call + onboarding | ~10–30 minutes | Instant | ~10–30 minutes | Instant |
Data sourced from each tool's public pricing page or product documentation as of May 2026. Submit corrections via contact.
How Aeralis lines up on each row
We built Aeralis to score well on the rows above, deliberately. Email content is processed in real time and then discarded; we don't keep your inbox content on our servers, just anonymous generation metadata. Style learning is passive: Aeralis picks up your greetings, sign-offs, and sentence patterns from the threads you open with the add-on visible. No forwarding setup, no per-profile email address to manage.
Billing is monthly on every tier, including Team. Annual is a discount option, never the only path. The free tier is 15 emails per month with one profile and the full grounding toolset (Google Search, Maps, context URLs); no credit card, no expiration. And it's a Gmail add-on, so it lives in the sidebar rather than as a separate tab or a Chrome extension that breaks when Gmail ships a new frontend.
Frequently asked questions
Why does pricing transparency matter for an email tool?
Email tools see one of the most sensitive surfaces in your day. A vendor that hides pricing usually segments customers by perceived budget rather than by value. The practical effect is that two companies can pay 10x different rates for the same product, with the difference going to whoever has a sharper procurement team. Public pricing forces vendors to compete on what they actually deliver.
What does "stored, policy opaque" mean in the matrix?
It means the tool processes your email content on its own servers without a public, specific policy on retention, training use, or third-party sharing. You're not necessarily at risk, but you can't verify what happens to your email after it leaves your inbox. Real-time processing (Aeralis) means the content is read for the immediate generation, then discarded.
Is annual-only billing always bad?
Not always — it usually means a discount in exchange for commitment. But for evaluating a new tool, monthly billing matters: it lets you switch if the product changes, the team grows, or your workflow shifts. Tools that only sell annual contracts often do it to lock in churn-prone customers, not because the product is genuinely better.
Why is "free tier" treated separately from "trial only"?
A genuine free tier has no time limit and no card requirement — you can stay on it indefinitely if your volume is low. A trial only gives you a window (usually 7–14 days) before the tool stops working unless you pay. The friction difference is large, especially for casual evaluators or users who only need an email tool occasionally.
What about features? This matrix only covers transparency.
That's on purpose. Features change every quarter; transparency rarely does. A tool that's opaque about pricing this year is almost always opaque next year, no matter what it ships. So we compare the boring stuff that tends to stay true. For feature-by-feature comparisons, see the individual alternative posts (linked at the bottom of this page).
Deep dives per competitor
Try the tool that scores highest on every transparency row
Free tier: 15 emails/month. No credit card. Add-on installs in under 2 minutes.