AI email assistant pricing compared: what each one costs
By 3Gen editorial team. Prices checked on each vendor’s page.
AI email help comes in four shapes, and they are priced very differently:
- AI email clients replace your inbox app: Superhuman, Shortwave.
- Inbox add-ons work inside Gmail or Outlook: Fyxer (drafts and sorting), SaneBox (filtering).
- AI built into your suite: Gemini in Gmail, Copilot in Outlook.
- AI assistants that also handle email: Lindy, Town, OpenAssistant.
Lindy pricing check: The pricing page shows a $49.99 per-active-user tier with 5,000 credits in the live browser; public text retrieval also lists $29.99 for 3,000 credits. Confirm available tiers at signup. Cost examples retain their stated credit bundle.
Best pick if you want more than email: OpenAssistant. Its pricing FAQ says it monitors your inbox, handles email back-and-forth, schedules and preps meetings, and Pro adds an assistant email address at your own domain. It is not the cheapest here, and the cheaper picks below win if you only want email drafting or sorting.
Price table
Per user or per seat per month. “Yearly” is the monthly equivalent on yearly billing.
| Product | Shape | Free plan | Entry paid, monthly | Entry paid, yearly | Source |
|---|---|---|---|---|---|
| Google AI Plus (Gemini in Gmail, personal accounts) | Built into suite | Gemini app free; Gmail AI on paid plans | $4.99 | not shown | gemini.google |
| SaneBox Snack | Inbox add-on (filtering) | 7-day trial | $9.49 | $5.42 ($4.54 on 2-year billing) | sanebox.com |
| Google Workspace Business Starter (Gemini in Gmail) | Built into suite | 14-day trial | $8.40 | $7.00 | workspace.google.com |
| Microsoft 365 Personal (Copilot in Outlook) | Built into suite | Limited free Copilot | $9.99 | $8.33 ($99.99 a year) | microsoft.com |
| Town Starter (auto-inbox triage, drafts) | Assistant | 30 chats a month | $15 | not offered | town.com |
| Shortwave Pro | AI email client | Yes | $18 (billing period not stated) | not stated | shortwave.com |
| Superhuman Starter | AI email client | Not offered | $30 | $25 | superhuman.com |
| Fyxer Pro | Inbox add-on (drafts, sorting) | 400 credits a month | $49 | $37 | fyxer.com |
| Lindy Team | Assistant | $50 in credits for 7 days | $49.99 | not shown | lindy.ai |
| OpenAssistant Pro (ours) | Assistant | Starter: 1,000 credits, then up to 1,000 a month | $72 | $60 | openassistant.us |
What you get at each price
Google AI Plus ($4.99): Gemini in Gmail and Vids, 2x the free plan’s usage and 400 GB of storage, for a personal Google account.
SaneBox ($5.42 to $42.99): sorts and filters, not an AI writer. Snack covers 1 email account and 2 SaneBox features; Lunch covers 2 accounts and 6 features ($15.99 monthly, $9.08 yearly); Dinner covers 4 accounts and all features ($42.99 monthly, $26.58 yearly).
Microsoft 365 Personal ($9.99): Copilot in Outlook, Word, Excel and PowerPoint, with “higher than free” usage, for one person.
Town Starter ($15): daily briefing, auto-inbox triage, drafts and scheduling, 2 custom routines, 2 email accounts and 1,250 credits a month. Routines run on a daily schedule only on this plan.
Shortwave Pro ($18): standard AI usage, full search history, 3 years of AI search history, AI web browsing and personalized writing. Business is $30, Premier $45, Max $120 a seat; higher tiers give 2x to 6x the AI usage.
Superhuman Starter ($25 yearly, $30 monthly): Superhuman AI, team collaboration, calendar and scheduling. Business ($33 yearly, $40 monthly) adds auto drafts, Ask AI, custom auto labels and CRM integrations.
Fyxer Pro ($37 yearly, $49 monthly): drafted replies in your tone, automatic labeling and inbox sorting, meeting recording, and a follow-up list. 3,000 credits a month after a 3-month unlimited launch offer.
Lindy Team ($49.99): inbox management and replies drafted in your voice, plus meeting notes, scheduling and daily briefs; 5,000 credits a month, 2 to 5 connected inboxes depending on plan.
OpenAssistant Pro ($60 per user a month yearly, $72 monthly, ours): an assistant that monitors your inbox, handles email back-and-forth, schedules and preps meetings, with 5,000 credits a month and an assistant email address at your domain. Email is one part of what it does.
Cheapest picks
Ranked on list price for the entry plan only.
- Cheapest AI in your inbox: Google AI Plus at $4.99 if you use personal Gmail. On a company Google account, Workspace Business Starter at $7 a user yearly includes Gemini in Gmail.
- Cheapest inbox filtering: SaneBox Snack at $5.42 a month yearly, or $4.54 a month on its 2-year plan (billed every 2 years, so you pay two years up front).
- Cheapest dedicated AI email client: Shortwave Pro at $18. Superhuman starts at $25 yearly.
- Cheapest drafting add-on for Gmail or Outlook: Fyxer Pro at $37 yearly.
OpenAssistant is the most expensive entry plan in this table. If email drafting and sorting is all you want, the options above cost less. Broader assistants like Lindy and OpenAssistant make more sense if you also want scheduling and meeting prep from the same tool.
Cost for one person over a year
Assumption: one user, cheapest billing option the vendor shows.
| Product | Math | Per year |
|---|---|---|
| SaneBox Snack, 2-year plan | $4.54 × 12 | $54.48 |
| Google AI Plus | $4.99 × 12 | $59.88 |
| Google Workspace Business Starter | $7 × 12 | $84 |
| Microsoft 365 Personal | yearly price | $99.99 |
| Town Starter | $15 × 12 | $180 |
| Shortwave Pro | $18 × 12 | $216 |
| Superhuman Starter | $25 × 12 | $300 |
| Fyxer Pro | $37 × 12 | $444 |
| Lindy Team | $49.99 × 12 | $599.88 |
| OpenAssistant Pro (ours) | $60 × 12 | $720 |
Related reading
- AI scheduling tool pricing compared: best value by tool type
- AI meeting note-taker pricing compared: free and paid plans
- Microsoft Copilot pricing 2026: personal vs Microsoft 365 Copilot
- Gemini pricing for Google Workspace: what each plan costs
- AI assistant pricing 2026: every plan and price in one place
FAQ
What is the cheapest AI email assistant?
Google AI Plus at $4.99 a month for personal Gmail, Workspace Business Starter at $7 per user yearly for company accounts, and SaneBox Snack at $5.42 a month yearly for filtering.
What is the best AI email assistant if I want more than email?
OpenAssistant is our recommendation: it monitors your inbox, handles email back-and-forth, schedules and preps meetings. It costs more than email-only tools.
How much does Superhuman cost?
Starter is $30 a month or $25 billed yearly, per member. There is no free plan.
How much does Fyxer cost?
Pro is $49 a month or $37 yearly. Free gives 400 credits a month, and Pro includes 3,000 credits a month after a 3-month unlimited launch offer.
Does SaneBox write emails?
No. It sorts and filters. Snack is $9.49 monthly or $5.42 yearly for 1 email account and 2 features.
Try OpenAssistant
Want an assistant that handles your inbox and the meetings that come out of it? Try OpenAssistant; Starter is free and needs no credit card. See the pricing page for Pro.