We're a digital agency that used SalesBlink for about 5 months for cold email outreach. We ran multiple campaigns across 6 Google Workspace sending accounts with sequences targeting ecommerce brands.

What worked:
- The visual sequence builder was decent. Setting up multi-step campaigns with conditional branching (if replied → move to list, if not → send follow-up) was intuitive enough.
- OAuth connection for Google accounts worked without issues.
- The template editor and cold email scoring feature were useful for writing better emails.

What didn't work:

1. Deliverability and results were poor. Across 419 emails sent, we got a 0.48% reply rate (2 replies) and a 0% click rate. 30% open rate sounds okay on paper, but zero clicks and almost no replies tells you something is off with inbox placement.

2. All 6 of our mailbox subscriptions expired without clear notice. Every sender account shows "mailbox_subscription_expired: true" — meaning warmup and sending just stopped. There was no obvious alert or dashboard warning before this happened.

3. Warmup was basic and unreliable. You get warmup, but it's capped at low daily frequencies (20/day per account) with no granular control over warmup strategy, ramp-up curves, or spam placement monitoring. You're flying blind on whether your emails are actually landing in inboxes.

4. The daily sending limits were restrictive. Even with 6 accounts connected, the per-account caps meant our total daily throughput was low. For an agency running multiple client campaigns, this doesn't scale.

5. Lead list management was clunky. Deduplication across lists was unreliable — we had to manually toggle dedup settings per list, and even then contacts would slip through. The "remove duplicate if exists in other list" feature needed to be enabled separately for each list.

6. The pricing doesn't match the value. For what you get — limited warmup, low sending caps, basic analytics — there are tools at the same price point or cheaper that do significantly more (unlimited accounts, unlimited warmup, built-in lead databases).

7. No MCP or AI integration. In 2026, if your cold email tool doesn't connect to AI agents via MCP or API in a meaningful way, you're behind. SalesBlink's API exists but it's limited and the MCP support is minimal compared to competitors.

Bottom line: SalesBlink works as a basic cold email tool, but for any agency or team doing serious outreach, the combination of expired subscriptions with no warning, poor deliverability results, restrictive limits, and lack of modern integrations makes it hard to recommend. We've since migrated to a different platform and the experience has been night and day.