Reply API Labs

Power up your product with business email sending capabilities to help your users scale personal communications with just a few lines of code.

AI Assistant API

Supercharge user emails with AI-backed algorithms to maximize open and reply rates

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Generate email copy with GPT-3

Reply’s AI Assistant is powered by GPT-3 - the most advanced language prediction model. It relies on deep learning to generate human-like texts, be it an initial email or a follow-up, in seconds. 

Use AI-backed algorithm to improve email text

Reply’s Email Quality Checker analyses email copy in real-time using 6 key parameters which affect open and reply rates:

  1. Subject length
  2. Word count
  3. Question count
  4. Reading level
  5. Positivity
  6. Spam word count
  • Full RESTful API

    Full RESTful API

    A unified API helps you integrate AI capabilities into your app.

  • AI-backed algorithm

    AI-backed algorithm

    AI Assistant is trained on 100M emails for maximum reliability.

  • White-label solution

    White-label solution

    Reply’s API integrates into your products with little to no effort.

  • Secure integration

    Secure integration

    Reply API solutions are Privacy Shield certified and GDPR compliant

Categorize emails by intent

Reply’s AI-backed algorithm automatically categorizes your replies into six default categories: Interested, Not Interested, Not Now, Do Not Contact, Forwarded.

With ‘Interested’ category, users can focus on conversations with sales-ready leads or build custom workflows as needed.

Scale up with compatible APIs

AI Assistant API is fully compatible with other Reply APIs:

  • Email Sending API that enables your users to send personal or business emails at scale
  • Email Warm-Up API that helps users build domain reputation and prepare email accounts for outreach
Scale up with compatible APIs
  • Email texts generation

    Email texts generation

    Create custom, human-like emails and follow-ups in seconds with built-in GPT-3 model.

  • Email quality check

    Email quality check

    Improve email subject line and body text to maximize engagement and response rate.

  • Inbox categorization

    Inbox categorization

    Boost your productivity by having an algorithm automatically sort through incoming emails.

  • Automatic opt-out via text

    Automatic opt-out via text

    Detect opt-out replies to automatically stop further communication with the contact.

  • Meeting intent detection

    Meeting intent detection

    Spot meeting intent in replies and streamline appointment bookings in your app.

  • Out-of-office handling

    Out-of-office handling

    Identify unavailable contacts and their date of return to automate communication workflow.

  • SPAM words detection

    SPAM words detection

    Increase your deliverability and avoid SPAM filters by removing trigger words from your emails.

  • Lead prioritization

    Lead prioritization

    Focus on engaged prospects with clear sales intent sorted to the ‘Interested’ folder.

  • Scalable API ecosystem

    Scalable API ecosystem

    Get the most of email outreach with compatible Reply APIs - Email sending API, AI Assistant API

Enrich your stack with AI Assistant now

Help your users generate human-like emails in seconds and maximize open and reply rates.

 Includes 24/7 help from a friendly and knowledgeable CS team.

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Frequently Asked Questions

  • How to get started with the AI Assistant API?

    To get started with AI Assistant API, get in touch with us using the [Contact Us] button on this page. We will be happy to schedule a discovery call with our product expert to identify the specifics of your business and suggest the best solution to meet your needs.

  • What kinds of companies use Reply AI Assistant API?

    Reply’s AI Assistant API would be a perfect addition to CRMs that doesn’t have the email sequencing functionality, recruiting applicant tracking systems (ATS), legal and financial (banking) products, marketplaces, educational institutions (universities and colleges).

  • How is the AI Assistant API secured?

    Reply’s API solutions are hosted in Microsoft Azure Cloud providing robust, physical data center security with environmental controls. We use encryption to keep user data safe both at rest and in transit over public networks and isolate it using multi-level permission checks.