AgentBag vs. building it yourself
You can assemble all eleven of these from parts. Most teams do, and most of them are still assembling eight months later, not because any single piece is hard, but because the interfaces between them are where the work actually is.
Time to a working agent with an inbox
a DIY stack:Provider webhook, parsing, threading, screening, contact storage: a sprint minimum, longer once screening is real.
AgentBag:Per-agent mailbox with classification and quarantine already wired to the permission model.
Permissions and retrieval
a DIY stack:Usually two systems that do not know about each other, which is how a permissions bug becomes a leaked citation.
AgentBag:Access policy filters the corpus *before* retrieval, so a document you cannot open cannot be paraphrased at you.
Cost control
a DIY stack:A dashboard you check after the fact.
AgentBag:A usage ledger with one writing module, plus an independent ceiling that can refuse a call.
Ours does not charge anyone today: billing is deliberately disarmed. The script that guards the single-writer property is not yet wired into CI. The enforcement path is what is built.
Multi-agent authority
a DIY stack:Typically an API key per agent, which is authority without a graph.
AgentBag:Scoped single-use caller tokens with a recorded trust decision on every edge.
Flexibility
a DIY stack:Total. Every choice is yours.
AgentBag:Opinionated. If our disclosure-tier model does not match yours, you will feel it.
This is a real loss, not a rhetorical one. Buy the bag for the interfaces, not to avoid decisions.
Rows marked in the third column with a note are the ones where we are honestly not better. Every comparison on this site has at least one (see the full capability ledger for the rest).