Inbox Zero vs ResponseBrain
When comparing Inbox Zero vs ResponseBrain, which AI Email Assistant tool shines brighter? We look at pricing, alternatives, upvotes, features, reviews, and more.
In a comparison between Inbox Zero and ResponseBrain, which one comes out on top?
When we put Inbox Zero and ResponseBrain side by side, both being AI-powered email assistant tools, There's no clear winner in terms of upvotes, as both tools have received the same number. The power is in your hands! Cast your vote and have a say in deciding the winner.
Think we got it wrong? Cast your vote and show us who's boss!
Inbox Zero

What is Inbox Zero?
Inbox Zero connects to Gmail or Outlook and uses AI to label incoming mail, draft replies in your voice, and surface what needs attention first. You get pre-written responses waiting when you open your inbox, plus bulk unsubscribe tools for newsletters you never read. The product works on web, iOS, Android, Slack, and Telegram so you can triage mail without living in your email tab.
Most email assistants stop at summarization. Inbox Zero also blocks cold emails, files attachments automatically on higher tiers, and pulls calendar and CRM context into drafts so scheduling replies match your real availability. The codebase is open source with 9k GitHub stars, SOC 2 Type 2 certification, and a self-host option for teams that want full control.
Starter plans cover solo operators who want labels, analytics, and reply drafts. Plus adds Slack, Notion, Stripe integrations, and an unlimited knowledge base. Professional adds team analytics and dedicated onboarding. Over 20,000 professionals use Inbox Zero, and every paid plan includes a 7-day free trial.
ResponseBrain

What is ResponseBrain?
ResponseBrain is an innovative AI-powered solution designed to revolutionize customer support e-mails. With ResponseBrain, businesses can effortlessly generate professional and effective customer service responses, saving valuable time and effort. Powered by cutting-edge artificial intelligence, this platform utilizes ChatGPT and GPT-4 models trained specifically on your business's relevant information. By leveraging existing content such as help center articles, blog posts, or previous e-mails, ResponseBrain creates a personalized AI assistant that comprehensively understands your business's intricacies. The AI assistant adeptly answers customer queries, freeing up your time to focus on core business activities. Compatible with any e-mail system and requiring no technical setup, ResponseBrain seamlessly integrates into your existing workflow. Additionally, ResponseBrain offers a user-friendly app for convenient access to your AI assistant at all times. Experience the efficiency and productivity gains that ResponseBrain brings to your customer support process today!
Inbox Zero Upvotes
ResponseBrain Upvotes
Inbox Zero Top Features
Connect Gmail or Outlook in two clicks and auto-label mail into categories like To Reply, Newsletter, and Urgent
Pre-drafted replies in your tone appear for every email that needs a response
Bulk unsubscribe and archive shows newsletters you never read with one-click cleanup
Works on Slack, Telegram, iOS, Android, and web without switching apps
Starter plan at $20 per user per month includes analytics and cold email blocking
Open-source codebase with 9k GitHub stars and SOC 2 Type 2 certification
ResponseBrain Top Features
Generates professional and effective customer service responses
Utilizes ChatGPT and GPT-4 models trained specifically on your business's relevant information
Adeptly answers customer queries
Compatible with any e-mail system and requiring no technical setup
Offers a user-friendly app for convenient access to your AI assistant at all times
Inbox Zero Category
- Email Assistant
ResponseBrain Category
- Email Assistant
Inbox Zero Pricing Type
- Freemium
ResponseBrain Pricing Type
- Freemium
