
Supabase
Firebase
PocketBase.io
Clerk
Xano
Convex.dev
Next.js
Appwrite provides web and mobile developers with a set of easy-to-use and integrate REST APIs to manage their core backend needs.

SMS-man.com
Smspva
AnonymSMS
HeroSMS
Temp SMSS
VirtualSMS.io
SMSCode.gg
Temporary Phone Numbers & Virtual Numbers for SMS Verification
Which is more popular?
Based on our record, AppWrite should be more popular than quackr. It has been mentioned 178 times since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | appwrite.io | quackr.io |
| Pricing | ||
| Company | Startup from Israel | Startup from the United Kingdom |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of AppWrite yet.
Quackr provides temporary phone numbers, temp numbers, and virtual numbers to receive SMS verification online without a physical SIM card.
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
AppWrite is recommended for developers building applications who require a scalable backend solution without the overhead of managing infrastructure. It is particularly suited for developers who prefer open-source platforms and those who want to avoid vendor lock-in. AppWrite's features make it a good fit for startups, hobby projects, and even educational purposes where full control over the backend is desirable.
Overall verdict
Why this product is good
Recommended for
Quackr is recommended for users who prioritize their privacy by not sharing personal phone numbers, frequent digital nomads engaged with international services, and anyone attempting to bypass SMS verification without a personal or permanent number.
Walkthroughs and reviews on video.
Appwrite quickstart tutorial
No quackr videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing AppWrite and quackr.
quackr's answer:
Quackr stands out by offering a seamless bridge between free public access and premium private security. Unlike many competitors that rely solely on low quality VoIP numbers (which are often blocked), Quackr provides Private Non-VoIP Numbers sourced from real SIM cards. This ensures high deliverability rates for strict services like Tinder, Gmail, and Banking apps, giving users a level of reliability that standard free sites cannot match.
quackr's answer:
Quackr is built on a robust cloud infrastructure designed for speed and security. We utilize advanced telecommunications APIs to bridge real world SIM networks with our digital dashboard, ensuring near instant SMS delivery. Our frontend uses modern frameworks (like React/Next.js) to ensure a fast, responsive experience on both mobile and desktop.
quackr's answer:
Quackr started with a simple mission to stop SMS spam. We realized that requiring a personal phone number for every minor sign-up was a privacy risk. What began as a free tool to protect users from telemarketers has evolved into a comprehensive privacy platform, helping thousands of users globally verify accounts securely without exposing their real identity.
quackr's answer:
Our primary audience consists of privacy conscious professionals, digital marketers, and cybersecurity enthusiasts. This includes social media managers managing multiple accounts, developers testing authentication flows, and individuals who want to secure their personal data against data breaches. They are users who value their digital footprint and are willing to invest in secure, private verification methods.
quackr's answer:
Competitors often provide recycled, spam filled numbers that fail verification checks. Users choose Quackr because we offer guaranteed privacy. With our paid rental option, users get a dedicated number that is theirs alone no shared messages, no interference. We combine the ease of a "one click" free service with the professional reliability of a paid private line, giving users the best of both worlds.
Share your experience with using AppWrite and quackr. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Appwrite’s self-hosted nature gives you complete control over your data and infrastructure, great for those who are security-conscious. It also offers a comprehensive set of features, including user authentication,...
Appwrite is an open-source backend-as-a-service platform that provides a comprehensive set of tools and APIs to help developers build modern applications. It focuses on simplicity and developer experience.
Appwrite is a self-hosted BaaS platform giving you all the tools you need to build all sorts of application.
We have no reviews of quackr yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Initially, I was using the Supabase free tier, but I was hitting the limits, and my app was becoming stale. Then I switched to Appwrite. Both are totally different; one is SQL, while the latter one is NoSQL. Although use node-appwrite... - Source: dev.to / 10 months ago
Appwrite is an open-source platform that simplifies backend setup by providing authentication, databases, storage, functions, and hosting all in one place. - Source: dev.to / about 1 year ago
I love Appwrite. My first hackathon was actually from Appwrite (using Appwrite) 2 years ago, and I've been using it ever since. - Source: dev.to / over 1 year ago
There are lots of them: https://quackr.io/ https://receive-smss.com/ https://sms24.me/ https://temp-number.com/ https://onlinesim.io/. - Source: Hacker News / about 1 year ago
I'm also curious because it seems like using a phone with no strings attached today seems almost impossible unless you get an actually old phone, which either works poorly or costs a lot as part of a retro collection or something. Even... Source: about 3 years ago
You can also take this poll over at bettor edge, and whichever team gets the most votes, will get an extra 5k donated to their respective charity (the loser will still get a 1k donation). So if you are so inclined, head over there and... Source: about 3 years ago
When comparing AppWrite and quackr, you can also consider the following products.


SMS-man offers a virtual numbers to receive SMS and create multiple accounts on WhatsApp, Telegram, Instagram, Twitter, Amazon and others. The SMS-man service provides numbers of such countries as China, US, India, Russia, UK, Germany, Ukraine etc.
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Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.
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The best SMS activation site! Operating since 2013. Payment by card. 60+ countries numbers. Purchase without registration!
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Open Source backend with realtime database, authentication, file storage and admin dashboard, all compiled in 1 portable executable.
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Totally free online service whereby you can Receive SMS Online, without the need of inputting your own mobile/cell number.
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