Shortlist by what you need
Start here if you know why you are leaving Klart AI.
Want the closest match?
MailMaestroMost similar to Klart AI in what it does, its category and its price.
Visit (opens MailMaestro in a new tab)Need a free plan?
Remember The MilkHas a free plan, rated 3.5 out of 5.
Visit (opens Remember The Milk in a new tab)Want the best rated?
EllieRated 3.5 out of 5 in our review, against 3.2 for Klart AI.
Visit (opens Ellie in a new tab)
At a glance
Green means better than Klart AI, red means worse. Prices are starting prices per month.
| Tool | Our rating | Starts at | Free plan | Best for | Compare |
|---|---|---|---|---|---|
 Klart AIBaseline | 3.2 | Free | Yes | Two GPT-4o-powered Gmail add-ons - one drafts, translates in 13 languages, and flags harassment or sarcasm; the other auto-labels, archives, and manages spam without complex filters. | |
| MailMaestro | 4.1+0.9 | $12/mo | Yes | AI email assistant that drafts, summarizes, and manages messages directly inside Outlook and Gmail. | vs Klart AI |
 Business AI | 3.0−0.2 | Free | Yes | 35+ GPT-4/GPT-4o-powered tools for emails, pitch decks, taglines, and meeting notes - one app for everyday sales, marketing, and communication work. | vs Klart AI |
| Ellie | 3.5+0.3 | Not listed | No | Ellie reads your sent mail, learns your tone and sign-offs, then drafts replies overnight in your own voice - ready to review by morning, for Gmail and Outlook. | vs Klart AI |
| Remember The Milk | 3.5+0.3 | Free | Yes | Long-running task manager now with a Beta AI-assistant integration - add and organize tasks just by asking Claude, ChatGPT, or Cursor. | vs Klart AI |
 IntelliMail | 3.0−0.2 | Free | Yes | Open Gmail, add context, click IntelliMail - a perfectly crafted email drafted in seconds, powered directly by your own OpenAI account. | vs Klart AI |
 Saidar | 3.5+0.3 | Free | Yes | An email and calendar assistant you talk to in iMessage, with no app to open. | vs Klart AI |
 ThinkTask | 3.5+0.3 | Not listed | No | Paste your notes and ChatGPT turns them into tasks automatically - AI suggests who should do them based on past experience, and analyzes results into performance reports. | vs Klart AI |
 Lunabot | 3.5+0.3 | Free | Yes | One AI assistant, five models (GPT-4o, Gemini, Claude, Mistral, Ollama), working identically across browser, mobile, desktop, Telegram and even Siri - no separate API key or ChatGPT account needed. | vs Klart AI |
The alternatives in detail
In order of how closely each one matches Klart AI.
MailMaestro
4.1$12/mo
vs Klart AI+0.9
AI email assistant that drafts, summarizes, and manages messages directly inside Outlook and Gmail.
- AI email drafting with three variation options per prompt
- Automatic thread summarization
- Context-aware reply suggestions
Free tier available with no credit card required
Full feature depth, including advanced summarization, concentrates in the paid Pro tier
Business AI
3.0Free
vs Klart AI−0.2
35+ GPT-4/GPT-4o-powered tools for emails, pitch decks, taglines, and meeting notes - one app for everyday sales, marketing, and communication work.
- 35+ AI tools spanning communication, marketing, and productivity
- Powered by GPT-4 and GPT-4o
- "Ask Anything" tool for open-ended writing, solving, and explaining
Real cross-platform availability (web, iOS, Android), not just a browser demo
Free credits are limited - real use requires a subscription
Ellie
3.5Not listed
vs Klart AI+0.3
Ellie reads your sent mail, learns your tone and sign-offs, then drafts replies overnight in your own voice - ready to review by morning, for Gmail and Outlook.
- Learns individual writing voice from sent mail - tone, sign-offs, phrasing
- Drafts replies overnight, ready to review each morning
- Custom plain-English rules for automatic email categorization
Explicit privacy stance - won't train general models on your email
Reply limits apply due to AI generation costs
Remember The Milk
3.5Free
vs Klart AI+0.3
Long-running task manager now with a Beta AI-assistant integration - add and organize tasks just by asking Claude, ChatGPT, or Cursor.
- Beta AI-assistant integration (Claude, ChatGPT, Cursor, and more)
- Natural-language task creation and list organization
- AI-assisted prioritization of what to focus on
AI integration works through assistants you may already use daily
AI-assistant integration is Beta and positioned as an add-on, not the core experience
IntelliMail
3.0Free
vs Klart AI−0.2
Open Gmail, add context, click IntelliMail - a perfectly crafted email drafted in seconds, powered directly by your own OpenAI account.
- AI email generation powered by the user's own OpenAI/ChatGPT account
- Template library with AI-powered suggestions
- Personalized greetings and sign-offs
Uses your own OpenAI account rather than an opaque third-party model
Requires the user to have their own OpenAI account and API access
Saidar
3.5Free
vs Klart AI+0.3
An email and calendar assistant you talk to in iMessage, with no app to open.
- Email and calendar management over iMessage
- Daily schedule summaries
- Surfaces messages needing a decision
Lives in a thread you already have open, removing a step rather than adding one
Needs standing access to your email and calendar, a very large grant
ThinkTask
3.5Not listed
vs Klart AI+0.3
Paste your notes and ChatGPT turns them into tasks automatically - AI suggests who should do them based on past experience, and analyzes results into performance reports.
- ChatGPT-powered task auto-generation from notes
- AI auto-tagging and task categorization
- AI-suggested task assignment based on skills and history
Auto-generating tasks from raw notes removes the biggest manual friction in task setup
Pricing isn't disclosed on the page reviewed
Lunabot
3.5Free
vs Klart AI+0.3
One AI assistant, five models (GPT-4o, Gemini, Claude, Mistral, Ollama), working identically across browser, mobile, desktop, Telegram and even Siri - no separate API key or ChatGPT account needed.
- Multi-model support (GPT-4o, Gemini, Claude, Mistral, Ollama)
- Genuine cross-platform sync (browser, mobile, desktop, Telegram, Siri)
- Chat with Memory across sessions
Unusually wide platform coverage (including Telegram and Siri) under one subscription
Top-tier features (Gemini Pro, image generation) require the $19.99/month Super plan
FAQ
Questions people ask
Is Klart AI free?
Klart AI has a free plan.
What is the best free alternative to Klart AI?
MailMaestro is the highest-rated alternative here with a free plan (4.1 out of 5). Other free options: Remember The Milk, Saidar, Lunabot.
What is the cheapest alternative to Klart AI?
Among paid plans, MailMaestro has the lowest starting price (from $12/mo). If you need it free, start with MailMaestro.
How did you pick these alternatives?
We match tools on what they do, their category and their price, using the details in our directory. Ratings come from our reviews and reader reviews.