If you ate not willing/able to pay for managed cloud services like Firebase, there are some really cool self-hosted alternatives out there (like deepstream.io a

If you ate not willing/able to pay for managed cloud services like Firebase, there are some really cool self-hosted alternatives out there (like deepstream.io and horizon.io). Open-sourcing software should always be a can, not a must. We could as well expect Amazon to open source DynamoDB, which is proprietary as well and still has quite a lot of users.