Here is a list of services available today.
Administrative Services: manage your digital assets
These are services that enable you to manage your online and digital assets post mortem focusing on functions such as: deleting social media accounts, bequeathing digital artefacts, storing passwords for loved ones to have access etc.
LegacyLocker / True Key
Social and emotional closure: say goodbye
These are services the place emphasis on not leaving things unsaid: a final confession of love, saying goodbye. These services usually limit the time for sending messages up to a year post mortem.
On going active presence: be there online posthumously
These are services that encourage users to plan for a long term online posthumous presence: sending messages to loved ones several decades after your passing or using AI to create a digital version of yourself to interact in your behalf in the future.