Bluesky vs Mastodon: Which Has the Worse Bot Problem?
TLDR
Both Bluesky and Mastodon allow bot accounts. Bluesky's only barrier is an email address. Mastodon's barrier depends on the server, ranging from email-only to manual human review. Neither platform has network-wide human verification. Truliv requires a liveness check for every account.
| Feature | Bluesky | Mastodon | Truliv |
|---|---|---|---|
| Monthly cost | $0 | $0 (hosted) or ~$5-15/mo (self-hosted) | $9–$19/mo |
| Human verification | None | None | Required |
| Bot protection | Weak | Weak | Guaranteed |
| Factor | Bluesky | Mastodon | Truliv |
|---|---|---|---|
| Account creation barrier | Email address | Email (most servers) or manual review (some) | 60-second liveness check |
| Human verification | None | None (server-dependent) | Required for every account |
| Bot prevention mechanism | Moderation + block lists | Server admin discretion | Structural (bots can't pass liveness) |
| Consistency across network | Consistent (no verification) | Highly variable by server | Consistent (all verified) |
| Domain verification | Domain handles (not human verification) | None standard | N/A — liveness is the standard |
| Cost | $0 | $0 (hosted) | $9/month after 30-day trial |
The Question This Comparison Actually Answers
Most “Bluesky vs Mastodon” comparisons focus on protocol, interface, or community culture. This one is specifically about the bot problem: which platform does a better job keeping automated accounts out, and how?
The short answer is that both platforms struggle with this, for different reasons, and in different ways.
How Bots Get Into Bluesky
Bluesky requires an email address to create an account. That’s it. There’s no secondary verification, no phone number check, no identity confirmation of any kind. A bot operator who can generate email addresses can generate Bluesky accounts at the same rate.
Bluesky’s response to this is a moderation infrastructure built on top of the AT Protocol. Community members maintain block lists of known bot accounts. “Labelers” attach metadata to flagged accounts. Custom feeds can filter content based on these labels. The tools are real and useful.
They’re also reactive. The labeler identifies a bot after it’s operated. The block list adds it after it’s been flagged. The new accounts created yesterday aren’t in any block list yet.
How Bots Get Into Mastodon
Mastodon’s situation is more fragmented. Each server sets its own registration policy.
On large public servers with open registration, the barrier is an email address, same as Bluesky. On servers with manual approval, a human reviews each application, and bots are rejected. On invite-only servers, you don’t get in without a referral from an existing member.
The servers with strict verification can be genuinely clean. The catch is that you have to know they exist, find them, and be accepted. For most new users, the server they pick is “mastodon.social” or whichever large instance is at the top of the joinmastodon.org list. Those servers have open registration.
What Neither Solves
Both platforms are working around the structural gap: they were not designed with human verification as a requirement at account creation. Bluesky’s AT Protocol doesn’t include it. Mastodon’s ActivityPub doesn’t include it. The moderation layers that both platforms have built are good engineering, but they’re compensating for the absence of the core thing.
Truliv’s approach is to treat the liveness check as the account creation requirement itself. Before you can post, you verify you’re physically present: blink when prompted, turn your head. Under 60 seconds. No biometric data stored. This doesn’t require moderation because it doesn’t allow the bots in to begin with.
If you’re on Bluesky or Mastodon and the bot situation is tolerable, there’s no reason to switch. If the bot presence is why you’re searching for comparisons, you’re looking at the question the right way — both platforms have the same structural gap.
Neither option feel right?
Both platforms have a bot problem. Truliv doesn't — every account is verified human.
Verdict
Mastodon can be better or worse than Bluesky depending on the server. Bluesky's bot situation is consistent (no structural prevention) but the platform's moderation tools are more developed. Neither platform prevents bots at the account creation level.
PROS & CONS
Bluesky
Pros
- The moderation tools (labelers, block lists, custom feeds) are genuinely useful for managing bot content
- Community-built infrastructure for identifying and labeling bot accounts
- Consistent experience across the platform
Cons
- Domain handle verification is for organizations, not human verification
- Nothing prevents the same email-based mass account creation that happened on Twitter
- Bots are moderated reactively, not prevented structurally
PROS & CONS
Mastodon
Pros
- Server-level moderation can be stricter than any centralized platform
- Invite-only and manually approved servers do keep bots out effectively
- The federated model means bad actors can be defederated (blocked at the server level)
Cons
- The servers where human verification is strict are hard to find without prior knowledge
- Most public servers are as open as Bluesky
- The fragmented moderation means your experience is unpredictable until you've been on a server for a while
Q&A
Which is safer from bots, Bluesky or Mastodon?
It depends on what you mean by safer. Bluesky's moderation tools (block lists, labelers) make bot management more tractable. Mastodon's best servers (invite-only, manually approved) are genuinely cleaner than anything Bluesky offers. Mastodon's worst servers (large, open-registration public instances) are just as bot-accessible as Bluesky. The safest option on either platform is not the platform itself — it's finding the right community on Mastodon, or finding the right block lists on Bluesky.
Q&A
Can Mastodon server admins actually prevent bots?
On their specific server, yes. Manual account approval means a human reviews each new member request. Bots get rejected. But this works only at the server level. If you join a server with manual approval, you're bot-free within your server's posts. Accounts from other federated servers appear in your home timeline too, and those servers may have no vetting at all.
Q&A
Will Bluesky's bot problem get worse as it grows?
Most likely. Bot operators target platforms proportionally to their value. A small Bluesky was not worth running large bot operations against. A Bluesky with tens of millions of users becomes a more attractive target. The same pattern played out on Twitter and Instagram. Without structural prevention at account creation, growth and bot proliferation tend to track together.