How long are images stored on the Gyazo servers?
All images will be stored for the foreseeable future. We plan to continue operating Gyazo for the long term.
Unless you choose to manually delete a capture you uploaded from the Captures page, it should always be saved.
Gyazo storage is provided by Google Cloud Storage and should be extremely reliable long-term.
If you know the URL of the image, you can always access the image.