Dev tools · alternatives · 2026

24 alternatives to Dinstar, Synway, Openvox GSM Gateways

Avyuktashop Provided Call Center Dialer GSM Gateways etc.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Dinstar, Synway, Openvox GSM Gateways launched in 2022; newer entries below may have overtaken it.

1. 1
   Google Voice▲470

   Ringing in 2017 📞

   2017 · blog.google · its alternatives →

2. 2
   Meucci▲77

   Free group GSM & VoIP to GSM calls

   2016 · its alternatives →

3. 3
   Sales Dialer For Mobile▲83

   Make more calls, no dialling and automated voicemail drops

   2022 · justcall.io · its alternatives →

4. 4
   OpenPhone▲271

   Simplest way to own a business phone number

   2018 · quo.com · its alternatives →

5. 5
   Voice Bridge▲182

   Receive your landline calls on your mobile.

   2016 · invoxia.com · its alternatives →

6. 6GY
   Gosms – Your own local SMS gateway powered by Golang▲101

   2015 · haxpax.github.io · its alternatives →

7. 7
   Seamless GPT▲80

   Easily access ChatGPT inside any Windows app

   2023 · ashxd.gumroad.com · its alternatives →

8. 8
   GSM Gateway▲1

   Send SMS Through Your Own SIM Card

   May 2026 · gsm.softclever.com · its alternatives →

9. 9
   Promptheus - Talk to ChatGPT▲96

   Use your voice to have conversations with ChatGPT

   2022 · chromewebstore.google.com · its alternatives →

10. 10
    Call Automation in Close.io▲153

    A power dialer built inside your CRM

    2017 · close.com · its alternatives →

11. 11
    Sales Dialer for iOS▲129

    Make more calls, close more deals with powerful sales dialer

    2023 · justcall.io · its alternatives →

12. 12
    Knocker▲94

    Unlock building doors with your voice – no hardware needed

    2024 · its alternatives →

13. 13
    Google Voice▲24

    gives you one number for all your phones

    2014 · google.com · its alternatives →

14. 14
    Avochat▲80

    Support your customers with live chat + SMS for business

    2020 · avochato.com · its alternatives →

15. 15
    LLM Gateway Chat▲77

    One balance. Every model. Chat, image, video & audio.

    Jun 2026 · lounge.llmgateway.io · its alternatives →

16. 16
    I built an international calling platform for the past 6 months▲38

    I built Voklit because I was tired of paying $2+/min to call banks and airlines overseas. Needed a US number that works anywhere with actual affordable rates. It's a web-based VoIP service (mobile apps coming soon). You get a real US phone number, pay-as-you-go minutes on top of a small subscription that covers the infrastructure. Bootstrapped, solo founder. Built with [Go/Next.js/ and Websockets] if anyone's curious about the stack. Adding more countries soon. Happy to answer questions or hear feedback.

    Jan 2026 · voklit.com · its alternatives →

17. 17
    DialZoo▲59

    Call Emails, not phone numbers !

    2014 · its alternatives →

18. 18
    AVO - your cell number over local SIM▲10

    Like regular voice roaming, but much cheaper.

    2019 · avo-simfree.com · its alternatives →

19. 19
    Dial Anyone▲17

    Make (very) Cheap International Calls from Your Browser!

    2025 · dialanyone.com · its alternatives →

20. 20
    Vox Manager▲8

    Talk to your phone, type 3x faster on your PC

    Aug 2026 · voxmanager.com · its alternatives →

21. 21WH
    WebRTC helped me to launch my startup after 2 years of waiting.▲42

    Hi All ,I been working on my idea , A Voice CRM solution for 2 years.When I started brainstorming the idea the only option I have to receive phone calls thru browser was a flash widget or use 3rd party providers like Twilio or Phono . Thanks to WebRTC we now integrated our VoIP services to receive and make calls directly thru browser .Please have a look and give us your feedback .Thanks Voz.io Team .

    2013 · voz.io · its alternatives →

22. 22
    Gramvoice▲2

    Buy and Activate Phone Numbers Worldwide

    Jun 2026 · gramvoice.com · its alternatives →

23. 23
    dialup▲16

    International calling

    2025 · dialup.live · its alternatives →

24. 24
    Calltuv▲20

    Make low-cost international calls from United States to 200+ countries. Call landlines and mobiles from your browser with crystal-clear quality and no hidden fees.

    Dec 2025 · calltuv.com · 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 →