Switching from Combot to Varta in 10 Minutes (Without Removing Combot First)
You've read the comparisons. You've decided to add AI moderation to your Telegram community. The next question is: how do you actually do this without breaking what's already working with Combot?
Short answer: don't break it. Run both bots side-by-side for the first week, verify Varta's verdicts against Combot's actual behavior, and migrate the moderation layer only after you have concrete evidence that Varta's judgment matches yours. The "big-bang switchover" — uninstall Combot, install Varta, hope for the best — is the highest-risk migration shape and the slowest to recover from if something goes wrong.
Why side-by-side, not big-bang
Three reasons. First, you're not actually replacing Combot's whole job — you're replacing the moderation engine inside it while keeping the analytics and welcome workflows intact. Combot does multiple jobs; only one needs swapping. Second, Varta starts in shadow mode by default, which means there's no decision to commit to upfront — the bot watches every message and DMs you what it would have caught, but doesn't act. You see the verdicts before granting any action permissions. Third, the cross-group reputation layer benefits from running across as many groups as possible from day one, so installing Varta everywhere immediately (even in shadow mode) starts the network-effect compounding earlier.
The pattern below is exactly what most admins of Varta-protected communities ran when they migrated from Combot. It takes about 10 days from install to autonomous-with-Combot-still-around steady state.
The 10-day side-by-side migration
Run both bots in parallel, verify Varta's catches, then promote when the verdicts match your judgment.
- Min 0–2Step 1 of 5
Add Varta in shadow mode (don't touch Combot)
Add @Varta_moderator_bot to your group. Shadow mode is the default — Varta watches every message, DMs you what it would have caught, but doesn't act. Combot keeps running normally as the active layer.
→ Both bots present; only Combot moderates. - Min 2–4Step 2 of 5
Verify the first hour of catches
Open Varta's admin DM. You'll see what it would have caught in the last few minutes. Compare to what Combot actually did. Look for: catches Combot missed, false positives, borderline calls.
→ First evidence: do verdicts match your judgment? - Day 2–7Step 3 of 5
Run side-by-side for one week
Daily check the Varta admin DM digest. Reply to corrections in plain language: "that wasn't spam, she's a regular." The bot updates its understanding of your group specifically. After 7 days you have real comparative data.
→ Bot learns your group; you accumulate decision data. - Day 7–10Step 4 of 5
Promote Varta, reduce Combot
Switch Varta to delete-only mode. Then to cautious. Reduce Combot's active rules incrementally — keep what it does well (analytics for Combot, federations for Rose, captcha for Shieldy, welcome flow for GroupHelp), retire the moderation rules.
→ Layer separation: keep Combot for its strengths, Varta for AI moderation. - Day 10+Step 5 of 5
Steady state — autonomous Varta
Varta runs autonomous mode. Combot runs alongside for the parts it does well. You check the daily summary in DM, occasionally tap Undo when you disagree, otherwise do nothing. Migration complete.
→ Admin time on moderation drops by ~80%.
What to keep from Combot
Combot does several things Varta deliberately doesn't replicate. Don't lose access to these by uninstalling Combot too eagerly:
- Engagement analytics dashboards. Combot's mature data layer — top posters, peak hours, message volume, member growth — is exactly the reporting layer Varta doesn't ship. If your admin workflow includes weekly or monthly reports to stakeholders, keep Combot's analytics on.
- Welcome messages + greetings. Varta never posts in your group, including for new members. If your group's identity includes a public welcome flow, that lives in Combot's domain.
- Scheduled posts + reminders. Combot's scheduling layer for announcements, repeating reminders, time-zoned posts. Not part of Varta's scope.
- Slow-mode + simple permissions. Telegram's native settings + Combot's per-role permission UI cover the workflow controls AI moderation doesn't replicate.
What you can retire on Combot once Varta is autonomous: keyword filter rules, link-blocklists, anti-flood thresholds, captcha gates. These are the layers Varta replaces with AI message-level reasoning. The first week of side-by-side comparison usually shows Varta catching most of what these rules would have caught, plus the spam shapes (Cyrillic-Latin substitution, image-embedded URLs, slow-burn DM funnels) that keyword rules structurally miss.
What you'll notice in the first 30 days
Concrete behavioral changes admins typically report after migrating:
- Fewer manual interventions. The "delete + ban + apologize to a member" sequence drops from a daily occurrence to maybe once a week. Most admins recover 30-60 minutes a day.
- Spam catch breadth widens. Image-based scams and Cyrillic-Latin substitutions stop slipping through. The catch curve flattens because the AI doesn't depend on a maintained keyword list.
- Cross-group offenders get caught faster across your network. If you run multiple communities, by week 2 you'll see the same offender flagged in group B based on a flag from group A — without you having to ban them twice. Cross-group intelligence shows the mechanism.
- The Combot dashboard stays useful. Combot's analytics keep working. You're not losing the engagement view; you're adding a moderation layer that runs silently underneath.
- False-positive rate stabilizes around week 3. Per the production stats from May 2026, the network-wide FP rate is 2.3% across 10 active languages and 46 group cultures. Your specific group settles into a similar number after the bot accumulates per-group corrections.
Honest tradeoffs
Two things you give up when you add Varta — even running alongside Combot — that I want to flag honestly:
Varta isn't permanently free. The free tier is full AI, but the 5-day trial timer activates the moment Varta catches its first spam in a given group. Groups that never see spam stay free indefinitely; groups with active spam will hit a paywall. After the trial, plans start at $5/month Hobby for up to 2,000 members across unlimited groups. Pricing comparison covers the full breakdown.
Varta doesn't post in your group, ever. If your moderation workflow currently relies on Combot posting "user banned" notifications or other public actions, you'll lose that visibility. Some admins love the silent operation; others find the lack of public bot posts disorienting at first. Plan for the change.
Ready to start?
Three minutes from this paragraph to "Varta is in shadow mode in your group":
- Open @Varta_moderator_bot and add it to your group.
- Grant the admin permissions: delete messages, restrict members, ban users.
- Done. Varta starts in shadow mode by default. Combot stays as your active moderation layer.
By tomorrow morning you'll have the first DM digest from Varta showing what it would have caught overnight. Compare to Combot's actual behavior. Do the verdicts match your judgment? If yes, the rest of the migration is straightforward.
If you want to test Varta's reasoning before installing anything, paste a real spam message into the live classifier demo — same AI engine that handles moderation across 46 communities and 29,000 members. The verdict comes back in 3 seconds with plain-language reasoning.
Related articles
Migration sequence above is the actual pattern admins of 46 Varta-protected communities followed when adding Varta alongside Combot. Add Varta in shadow mode →