Mail Vault
A searchable web archive of your mail history: connect your inbox, it indexes everything, then you can search, browse by year, and export a searchable static site.
Published · Last assessed · Methodology v1.1 · How ideas are researched and assessed
Problem in brief
People who have used one email provider for twenty years or more have no easy way to search, archive or migrate their full mail history. The problem surfaces when they want to leave a provider or simply tidy up.
- Who has this problem
- Long-time personal email users
- Opportunity explored
- Mail Vault, described below
The problem in detail
After 20+ years on one email provider, people have no easy way to search, archive, or migrate their full mail history.
Proposed product
A searchable web archive of your mail history: connect your inbox, it indexes everything, then you can search, browse by year, and export a searchable static site.
Why now
Cheap object storage and local-first search libraries make full-text indexing of decades of mail affordable for a solo builder, something that wasn't practical a few years ago.
Smallest useful version
Read-only IMAP import + full-text search over one mailbox, no export/hosting yet.
Potential ways to charge
- One-time payment per import
- Monthly hosting fee for the searchable copy
Routes to early customers
- Hacker News and privacy-focused communities where the original complaint surfaced
- Digital estate planning and personal archiving forums
Main risks
- People may not trust a third party with full access to decades of private correspondence.
Questions to test first
- Will people connect a read-only mailbox credential to a third-party importer at all?
- Is full-text search over old mail actually the thing people want, or just a one-time export?
Evidence and sources
The sources this assessment is based on. Evidence level: Limited, counted from these sources as described in how ideas are assessed. Findings are what a source shows; anything the research only inferred is marked as an inference.
Where the problem was reported
Public posts in which people described this problem, grouped into one problem before research began.
- Ask HN: Best way to archive 25 years of emails · news.ycombinator.com · 29 August 2026
This is a researched opportunity, not a guarantee of commercial success. The evidence level and sources show how much is known; the risks and questions to test show what is not.
Related product opportunities
Chosen for a shared category, customer or problem.
Productivity
Claim ClockWhen a car insurance repair or a boiler or home-emergency claim stalls, the insurer or its approved repairer controls the facts that decide it: whether the damage counts as wear, whether a part is really on back order, when an engineer will actually attend.
Finding and judging opportunities like this one
The first 2 guides use Mail Vault as a worked example, and each explains the method behind it.
- How to find problems worth solving
A problem is worth solving when specific people repeatedly have it, it costs them something, they already work around it and you can reach them. How to check each, with examples.
- How to tell a product idea from a real opportunity
A product idea describes something you could build; an opportunity is a problem specific people have, pay for and work around. How to tell the two apart, with evidence levels.
- How to find product ideas worth building
Find product ideas by starting from problems people describe in their own work, not from brainstorms. A practical method with real examples, from the research behind Daily Product Idea.
- How to evaluate a product idea before you build it
Evaluate a product idea by scoring the evidence rather than your enthusiasm: six dimensions, a written reason for each score, the assumptions it rests on and the cheapest test to run first.