20+ Best Alternatives to Proton in 2026
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Looking for an alternative to Proton? 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 →
Perplexity
$2.0BAI-powered answer engine delivering real-time, cited responses to complex queries.
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Free
- 2View alternative →
Harvey
$1.7BThe AI platform for elite law firms.
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Paid
- 3View alternative →
Grammarly
$1.2BAI writing assistant for individuals and teams.
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Free · From $12/mo
- 4View alternative →
Wordware
$30MBuild AI agents by writing in plain English
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Freemium · From $20/mo
- 5View alternative →
Wonderful
$286MMultilingual enterprise AI agents for customer service
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Enterprise · Contact sales
- 6View alternative →
Wispr
$81MEffortless voice dictation powered by AI
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Free
- 7View alternative →
Mutiny
$71.6MAI agent for B2B website personalization and ABM
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Enterprise · Contact sales
- 8View alternative →
aiOla
$58MEnterprise voice AI for noisy, jargon-heavy field operations
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Enterprise · Contact sales
- 9View alternative →
Reality Defender
$48MReal-time deepfake detection for enterprises, platforms, and governments
Why it's similar: Shares categories with Proton — AI Privacy.
💵 Free
- 10View alternative →
Endgame
$47.5MAI answer engine for enterprise sales teams
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Enterprise · Contact sales
- 11View alternative →
tl;dv
$4.5MAI meeting notetaker for Zoom, Google Meet, and Teams
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Free · From $18/mo
- 12View alternative →
ClickUp
$537.5MAll-in-one productivity platform with built-in AI for tasks, docs, and project management
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Free · From $7/mo
- 13View alternative →
Miro
$476MAI-powered visual collaboration and online whiteboard platform for distributed teams
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Free · From $8/mo
- 14View alternative →
Cyberhaven
$250MAI-powered data protection built on data lineage and behavioral analysis
Why it's similar: Shares categories with Proton — AI Privacy.
💵 Free
- 15View 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 Proton — AI Productivity.
💵 Enterprise · Contact sales
- 16View alternative →
Plus AI
$8MAI presentation maker for Google Slides and PowerPoint
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Free trial · From $10/mo
- 17View alternative →
Sentra
$105MCloud-native data security for the AI era
Why it's similar: Shares categories with Proton — AI Privacy.
💵 Enterprise · Contact sales
- 18View alternative →
Abridge
$762MEnterprise-grade AI for clinical conversations, trusted by the largest healthcare systems to improve outcomes at scale.
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Enterprise · Contact sales
- 19View alternative →
Qventus
$200MOperational AI that automates hospital workflows from the OR to the ED.
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Enterprise · Contact sales
- 20View alternative →
Aira
$60MOn-demand visual interpreting that makes the world accessible for blind and low-vision people
Why it's similar: Shares categories with Proton — AI Productivity.
💵 Free
Frequently asked questions
What are the best alternatives to Proton?
The top-ranked alternatives to Proton on NeuronFeed are Perplexity, Harvey, Grammarly, Wordware, Wonderful. Rankings are based on our Neuron score, which weighs funding, momentum and editorial signal.
Is there a free alternative to Proton?
Yes — Perplexity, Grammarly, Wispr offer a free plans. See the pricing column for each alternative above.
How is this list ranked?
We rank alternatives by shared categories with Proton, then by our proprietary Neuron score (0–100) which combines funding, team quality, momentum, and editorial input. The list refreshes every 30 days.
Proton vs Perplexity — which is better?
It depends on use case. Perplexity (AI-powered answer engine delivering real-time, cited responses to complex queries.) is the #1-ranked alternative. See the full side-by-side at /compare/proton-vs-perplexity.
Explore more around Proton
Contextual paths to related AI startups, deals and rankings.