Developer: Superhuman (formerly Grammarly) | Free Plan: No (no free tier) | Starting Price: $25/user/month billed annually (Starter) | Best For: Founders, executives, and sales teams wanting the fastest possible inbox

Developer: Minami | Free Plan: No (custom quote, money-back guarantee) | Starting Price: Custom, based on support volume | Best For: Ecommerce brands and DTC retailers automating post-purchase support

Developer: OpenAI | Free Plan: No (Business starts at 2 users) | Starting Price: $20/user/month (billed annually) | Best For: Growing companies needing a secure, shared ChatGPT workspace

Developer: HubSpot | Free Plan: No (included with Professional/Enterprise, then pay-per-resolution) | Starting Price: $0.10/answer (Data Agent) | Best For: Marketing, sales, and customer service teams already using HubSpot's CRM

Developer: Salesforce | Free Plan: Yes (Salesforce Foundations, $0, requires Enterprise Edition+) | Starting Price: $2/conversation (or Flex Credits from $0.10/action) | Best For: Enterprises already running Salesforce CRM across service, sales, and support

Developer: Airtable | Free Plan: Yes | Starting Price: $20/user/month billed annually (Team plan) | Best For: Marketing teams, product operations, HR and finance departments, enterprises

Developer: Frase (Copysmith AI) | Free Plan: No (free trial available) | Starting Price: $39/month billed annually | Best For: SEO teams and content marketing teams optimizing for Google and AI search