Sidekick AI
Productivity
Your AI pal for everyday productivity
Like KlartAI, Sidekick AI is in the Productivity category. Both are freemium. Worth comparing on the detail page.
We've curated 46 of the best alternatives to KlartAI, ranked by feature overlap, topic similarity, user ratings, and popularity. Sidekick AI, Alva AI, and Rehance lead the list as the closest matches.
Updated May 18, 2026
The list includes 46 freemium, so whether you're looking for a no-cost replacement or a more capable paid tier, there's an option to compare. KlartAI itself is freemium, which makes freemium alternatives the most natural starting point.
Many of these tools cluster around use cases like Productivity, Ai Assistant, Productivity Tool, and Agent — the same problem spaces KlartAI addresses. Cross-referencing tools that overlap on multiple topics gives a more reliable signal than category alone, because two products in the same category can still serve very different workflows.
Our ranking weighs eight signals: shared category, topic overlap, feature overlap, name and description text similarity (via PostgreSQL's pg_trgm and tsvector), Bayesian-smoothed user ratings, pricing-model match, popularity, and editorial overrides. Scores are then normalized within each tool's own candidate pool so the top match always represents the strongest available alternative.
Use the table of contents below to jump to free or paid alternatives, or scroll down to compare each option side-by-side with KlartAI.
Ranked by compatibility score
Productivity
Your AI pal for everyday productivity
Like KlartAI, Sidekick AI is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
Your AI co-pilot for daily tasks and goals.
Like KlartAI, Alva AI is in the Productivity category. Both are freemium. Worth comparing on the detail page.
0 free and 46 freemium options.
22 additional candidates
Sidekick AI ranks as the highest-scoring alternative to KlartAI, based on shared category, topic overlap, feature similarity, and user ratings. Ratings are still being collected for this tool.
Yes — 0 fully free and 46 freemium alternatives are available, including Sidekick AI, Alva AI, and Rehance.
Sidekick AI is similarly priced (freemium) and sits in the same category (Productivity). View its detail page to compare features, integrations, and reviews side-by-side.
Top Productivity alternatives include Sidekick AI, Alva AI, Rehance, and AFFiNE AI. These tools share the same primary category and have meaningful topic overlap with KlartAI.
Neither KlartAI nor Sidekick AI has user ratings yet — be the first to review either tool to help future visitors compare them.
Productivity
Add AI assistants to your SaaS in minutes
Like KlartAI, Rehance is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
The universal editor for work, play, and creation.
Like KlartAI, AFFiNE AI is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
Boost productivity with AI-powered tools
Like KlartAI, Ninja AI is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
Time-Saving AI Agents For Your Browser
Like KlartAI, Ask Steve is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
Your AI Secretary for 50+ Apps!
Like KlartAI, Saidar2.1 is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
Add GPT-3 to Google Workspace for AI-powered productivity
Like KlartAI, Docsium is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
Simplify collaboration with AI-driven group conversations.
Like KlartAI, BeGenieUs is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
10x your productivity with AI-powered chat and automation
Like KlartAI, Alice App is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
Boost productivity with your personal AI workspace.
Like KlartAI, PopAi is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
Your GPT-4 AI assistant for all websites.
Like KlartAI, Walles is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
Bash your workload. Meeting follow-ups, project docs, and industry insights.
Like KlartAI, Bash AI is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
All-in-one AI platform for team productivity
Like KlartAI, AICamp is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
AI-powered copilot for learning and productivity.
Like KlartAI, Definio is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
AI-powered virtual assistant for enhanced productivity
Like KlartAI, AI Toolbar is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
AI toolset for Chrome: Boost productivity on any page.
Like KlartAI, DeepTab is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
AI-powered teleprompter and web intelligence tool
Like KlartAI, ProNoto is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
All-in-one planner for productivity and time management.
Like KlartAI, Elisi is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
AI-powered productivity management for teams.
Like KlartAI, Kroolo is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
Bring the magic of AI into your browser
Like KlartAI, WebWand AI is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
Achieve your goals and get things done with Mentor and AI
Like KlartAI, Mentor: Get things donev is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
Your context-aware AI chatbot for effortless browsing.
Like KlartAI, PageGPT is in the Productivity category. Both are freemium. Worth comparing on the detail page.
Productivity
AI copilot for writing, editing, and translating anywhere on your desktop
Like KlartAI, XX.AI is in the Productivity category. Both are freemium. Worth comparing on the detail page.
40 more free/freemium alternatives listed below. Browse all KlartAI alternatives ↓
46 free or freemium alternatives to KlartAI on /tools/klartai/alternatives.
Like KlartAI, Qolaba AI is in the Productivity category. Both are freemium. Worth comparing on the detail page.
