20+ Best Alternatives to Mainframe in 2026
Building interfaces for the future where operating systems are built around actions, not apps, powered by AI.
Looking for an alternative to Mainframe? Below are 20 AI startups working in the same space — ranked by our Neuron score so the most credible options come first. Each card shows what makes the tool a viable substitute, pricing signals, and funding stage.
- 1View alternative →
Notion AI
$270MConnected AI workspace
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Free · From $8/mo
- 2View alternative →
Grammarly
$1.2BAI writing assistant for individuals and teams.
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Free · From $12/mo
- 3View alternative →
Augment Code
$252MAI agents that understand your entire codebase, from IDE to CLI to code review.
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Paid · From $20/mo
- 4View alternative →
Jasper
$125MAI copilot for enterprise marketing teams.
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Free trial · From $49/mo
- 5View alternative →
Tines
$146.2MThe intelligent workflow platform to securely scale AI and automation, integrating agents, teams, and tools with speed and control.
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Enterprise · Contact sales
- 6View alternative →
Poke
$25MAn AI personal assistant that lives inside your text messages
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Free
- 7View alternative →
Dust
$21MDeploy, orchestrate, and govern fleets of specialized AI agents safely connected to your company's knowledge and tools.
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Enterprise · Contact sales
- 8View alternative →
Legora
$680MCollaborative AI for exceptional lawyers, streamlining research, drafting, and review to deliver greater value.
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Enterprise · Contact sales
- 9View alternative →
Wordsmith AI
$30MFleets of legal AI agents that turn in-house legal teams into revenue drivers.
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Enterprise · Contact sales
- 10View alternative →
Day.ai
$24MAn AI-native CRM that builds itself from your emails, meetings, and conversations.
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Paid
- 11View alternative →
Adept AI
$350MAI that takes actions in any software
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Enterprise · Contact sales
- 12View alternative →
Writer
$321MFull-stack generative AI for enterprise
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Enterprise · From $29/mo
- 13View alternative →
Sesame
$307.6MLifelike voice companions and AI smart glasses
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Freemium
- 14View alternative →
Typeface
$165MPersonalised generative AI for brand content
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Enterprise · Contact sales
- 15View alternative →
Wordware
$30MBuild AI agents by writing in plain English
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Freemium · From $20/mo
- 16View alternative →
Lindy
$49.9MBuild AI assistants in minutes
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Free · From $50/mo
- 17View alternative →
Moveworks
$315MAI copilot for enterprise IT and HR
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Enterprise · Contact sales
- 18View alternative →
Atomicwork
$39MAgentic ITSM and employee service platform
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Paid
- 19View alternative →
Tana
$25MAI-native workspace built around a live knowledge graph, Supertags, and voice-driven capture.
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Pricing not listed
- 20View alternative →
Dazzle
$8MAn AI personal assistant from former Yahoo CEO Marissa Mayer
Why it's similar: Shares categories with Mainframe — AI Agents, AI Productivity.
💵 Free
Frequently asked questions
What are the best alternatives to Mainframe?
The top-ranked alternatives to Mainframe on NeuronFeed are Notion AI, Grammarly, Augment Code, Jasper, Tines. Rankings are based on our Neuron score, which weighs funding, momentum and editorial signal.
Is there a free alternative to Mainframe?
Yes — Notion AI, Grammarly, Tines offer a free plans. See the pricing column for each alternative above.
How is this list ranked?
We rank alternatives by shared categories with Mainframe, then by our proprietary Neuron score (0–100) which combines funding, team quality, momentum, and editorial input. The list refreshes every 30 days.
Mainframe vs Notion AI — which is better?
It depends on use case. Notion AI (Connected AI workspace) is the #1-ranked alternative. See the full side-by-side at /compare/mainframe-vs-notion-ai.
Explore more around Mainframe
Contextual paths to related AI startups, deals and rankings.