AI · alternatives · 2026

24 alternatives to Swifter

Email subject line generator for B2B & B2C, built with GPT-3

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Swifter launched in 2021; newer entries below may have overtaken it.

1. 1
   Free AI Email Subject Line Generator▲174

   Create impactful unique subject lines using AI and GPT-3

   2021 · encharge.io · its alternatives →

2. 2
   AI Sales Email Assistant by Reply▲342

   Generate human-like emails and follow-ups with GPT-3

   2021 · reply.io · its alternatives →

3. 3
   AI Subject Line Generator▲96

   Generate a brilliant subject line in seconds, with GPT

   2023 · ecosend.io · its alternatives →

4. 4
   Magic Email▲347

   Summarize and generate emails using GPT-3 in one click.

   2020 · automania.com.mx · its alternatives →

5. 5
   OpenHigher AI▲246

   Unignorable email subject lines powered by GPT-4

   2023 · its alternatives →

6. 6
   Email Subject Line Generator▲130

   Instantly generate catchy email subject lines

   2023 · subjectlinegenerator.com · its alternatives →

7. 7
   EmailGPT - AI Email Generator▲102

   Create stunning marketing emails in a few clicks

   2023 · email.workgpt.us · its alternatives →

8. 8
   Magic Sales Bot▲359

   Write sales emails 10x faster with GPT-3

   2021 · rpdoyle.com · its alternatives →

9. 9
   Jason AI▲470

   Write and respond to your business emails with ChatGPT

   2023 · reply.io · its alternatives →

10. 10
    SwiftCover▲73

    AI-powered cover letter generator

    2023 · swiftcover.ai · its alternatives →

11. 11
    MailTester.AI▲327

    Forward an email and get an AI deliverability report in 30s

    2025 · mailtester.ai · its alternatives →

12. 12
    Cold Email Subject Line Generator▲124

    Get them to read your cold emails.

    2020 · mails.wtf · its alternatives →

13. 13
    Mailr - AI Email Writer▲133

    Write and reply to emails using ChatGPT

    2023 · mailr-ai.com · its alternatives →

14. 14
    GMPlus▲154

    Transform your gmail communication with ChatGPT AI

    2023 · gmplus.io · its alternatives →

15. 15
    Shortwave AI Email Assistant 2.0▲214

    The ultimate search, analysis, and productivity companion

    2024 · shortwave.com · its alternatives →

16. 16
    Banger Mail▲139

    Win and keep customers with email automation your AI runs

    Jul 2026 · bangermail.com · its alternatives →

17. 17
    325 ChatGPT Email Marketing Prompts Pack▲156

    Use ChatGPT to become a top 1% email marketer

    2023 · pascio.gumroad.com · its alternatives →

18. 18
    Mailerr▲119

    Automated Infrastructure for boosting Cold Email Delivery

    2025 · mailerr.co · its alternatives →

19. 19
    Quicklines▲138

    Cold email personalized AI icebreakers to get more responses

    2022 · its alternatives →

20. 20
    Cold Email Grader▲128

    Send better cold emails with AI-powered feedback. For free.

    2020 · coldemailgrader.com · its alternatives →

21. 21
    Ortto AI Subject Line Writer▲95

    Predict open rate before you send an email

    2022 · ortto.com · its alternatives →

22. 22
    AI Email Writer▲97

    Effortless email creation with GPT-3

    2023 · ai-emailwriter.com · its alternatives →

23. 23
    AI Subject Line Generator▲13

    Generate attention-grabbing subject lines with advanced AI

    2025 · asgenerator.ai · its alternatives →

24. 24
    Re:GPT▲101

    Ai-Powered Email Assistant for Gmail & Outlook

    2023 · re-gpt.email · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →