Comparison with other RNGs

Use this table to compare the most popular Random Number Generators.

	Random.win	Chainlink VRF	Quantum RNG chips	Random.org	Javascript Math.random()
Works for offchain & onchain apps	✅ We have a Web2 API for offchain apps and a Web3 API for onchain apps	❌ Onchain only	❌ Offchain only	❌ Offchain only	❌ Offchain only
Built-in random draw features	✅	❌	❌	✅	❌
Setup	✅ No account creation needed. Connect to our API using your existing Ethereum address	🟧 You need to hire developers to create a full-fledged smart contract from scratch	🟧 Lengthy shipping & tedious installation	🟧 You need to create a paid account in order to use their API	✅ No setup
Unpredictable random numbers	✅ A proof of randomness is verified onchain before the randomness is delivered to you	✅ A proof of randomness is verified onchain before the randomness is delivered to you	🟧 In theory yes, but it can be backdoored	🟧 In theory yes, but it can be backdoored	❌ Use a predictable seed such as the current time
Trustless	✅ Because the source code is tamper-proof we have no way to manipulate the randomness even if we wanted to	✅ Tamper-proof source code	❌ You have to trust the whole hardware supply chain and that no one implemented a backdoor	❌ They say they use atmospheric noise but they could as well just give you fake numbers and you wouldn't be able to detect it	✅
Verifiable	✅ The random numbers can be verified onchain in 10 seconds without any prior knowledge of Ethereum	✅ Verifiable smart contracts	❌ Your company can claim to use a QRNG but your users won't be able to verify this claim	❌ Your users cannot verify that you have really used random.org. On top of that, random.org itself isn't verifiable.	❌
Legal protection	✅ No one can sue your company because you can prove your game outcomes thanks to the blockchain	✅ No one can sue your company because you can prove your game outcomes thanks to the blockchain	❌ Nothing can be proved	❌ Nothing can be proved	❌ Nothing can be proved
User experience	✅ Your users immediately know that you're legit because you're using smart contracts	✅ Your users immediately know that you're legit because you're using smart contracts	❌ From the user point of view your system is a black box	❌ From the user point of view your system is a black box	❌ From the user point of view your system is a black box
Open source	✅	✅	❌	❌	✅
Audited	✅ GLI-19 certified	🟧 Their raw randomness is GLI-19 certified, however if you use it to create your own random draw algorithm on top of it, the resulting solution won't be GLI-19 certified	✅	🟧 In theory yes, but you have no guarantee that they use the algorithm that was audited	❌
Availability	✅ Ultra reliable. Since its launch in 2015, Ethereum has never experienced any downtime or outage of any sort.	✅ Uses blockchain as well	✅	❌ Their server has been down several times in the past	✅
Automation	✅ You can make a request now but schedule the randomness generation to be executed sometime in the future. This is very useful for example if you host a lottery every day at the same time	❌ You need to use something like a cron job to automate your requests	❌ You need to use something like a cron job to automate your requests	❌ You need to use something like a cron job to automate your requests	❌ You need to use something like a cron job to automate your requests
Generation time	✅ Takes 5 seconds to generate the randomness but you can make requests ahead of time in order to receive the randomness exactly when you need it	🟧 Takes 5 seconds to generate the randomness	✅ Instant	✅ Instant	✅ Instant
Pay in	✅ Crypto or fiat	🟧 Crypto only	🟧 Fiat only	🟧 Fiat only	✅ Free