Has anyone benchmarked 1Password's speed against Bitwarden on a slow network?

Your numbers line up with my internal testing for a scaled deployment. The initial sync overhead you measured, ~15MB vs ~2MB, points directly to architectural choices in how each client caches metadata and UI assets.

The more critical metric for a slow network baseline is delta sync performance after that initial hit. In my experience, 1Password's subsequent sync operations still transmit significantly more data per change than Bitwarden, due to how they bundle revision histories. A single password change on a throttled line can take 4-5 seconds with 1Password, while Bitwarden's updates are often sub-second.

This becomes a real cost factor when you have a mobile workforce on poor connections - the aggregate data consumption over a month is non-trivial. Have you run any tests on incremental sync latency?

Wow, that's a huge difference. I wouldn't have guessed the initial download sizes would be that far apart for just a vault sync. I use 1Password personally and haven't noticed, but I'm on decent Wi-Fi most of the time.

That makes me wonder, is the 15MB download something that happens every time you set up the app on a new device, or just once per account? I'm trying to think about the user experience for my team, some of whom have really spotty connections.

Thanks for sharing the actual numbers, by the way. It's hard to find concrete data like this.

It's every new device. The app pulls its entire UI framework and local cache, not just your vault data. That's the "modern app" experience for you.

Your team on spotty connections will feel it every time they get a new laptop or phone. Bitwarden's approach is leaner because it's essentially a web app in a shell.

1Password's design assumes you're always on a good connection. That assumption is baked in, and users on the edges pay for it.

Appreciate the real-world numbers. This is the kind of data-driven post we need more of.

Your point about architecture is the core of it. The initial payload discrepancy you noted isn't just a one-time cost, it's indicative of the ongoing sync model. The larger framework means UI updates and even minor feature tweaks likely get bundled into those downloads, which can hit users on metered or poor connections repeatedly.

My one caveat: while efficiency is clearly better on Bitwarden's side here, some of that overhead in 1Password might be trading bandwidth for offline resilience or faster local operations after the initial hit. Have you tested the experience after that first sync, like opening the app or searching while offline? That trade-off might matter for some use cases, even if the network cost is steep.

That's a great point about the trade-offs. I haven't run formal offline tests, but anecdotally, 1Password does feel snappier for local searches once everything's cached. That heavy initial download is basically pre-paying for that experience.

The ongoing cost you mentioned is what worries me more, though. Even if offline ops are fast, the sync model seems to bundle a lot of metadata with each delta. On a slow link, that turns every tiny edit into a noticeable wait, which can break your workflow. Bitwarden feels more like a stateless client that just fetches what it needs, when it needs it.

I wonder if 1Password's architecture is optimized for a world of constant, high-bandwidth connections, making offline a secondary benefit rather than the primary goal.

You're absolutely right about delta sync being the critical metric for daily use. That overhead from bundled revision histories is something we've seen affect users on satellite or rural cellular connections the most, where even a few extra kilobytes per change adds up.

It's a tough trade-off, because those revisions are useful for audit trails and recovery. But the sync efficiency hit is real. I'd be curious if anyone has tested whether disabling item history in 1Password reduces that delta size at all.