Teams that trust Coastar LNC with their transactional email.
Below are stories from engineering and lifecycle teams that moved their transactional email to Coastar LNC. We've included the bounce rates, complaint rates, and volume figures each customer agreed to publish.
From the teams who actually run the sends.
"The real-time dashboard is the first one my CFO actually trusts. Every number has a source and a timestamp — no marketing roundups, no inflated claims. When we needed to answer 'how many emails did we send yesterday,' the answer was right there."
"We run a high-volume onboarding sequence — 40k emails a day at peak. Coastar LNC's send-time model lifted our open rate by 22% with zero changes to our content. The AI runs on every send, not as an add-on."
"Their suppression pipeline is airtight. We had a legacy system that was sending to invalid addresses for years — complaints were creeping up and our reputation was starting to take a hit. Coastar LNC cut the bad addresses out automatically on day one."
"The SPF/DKIM/DMARC setup was the part I was dreading most. It took 20 minutes, the dashboard showed all three green, and the first test email landed in Gmail's inbox instead of spam. That's never happened with any other provider we've used."
"The AI subject-line scoring has become something our marketing team actually uses. It flags phrasing that's going to trigger spam filters before we send, and it's been right every time we ignored it."
"Migrating from SES directly to Coastar LNC was the best decision we made for our engineering team. We kept the AWS backbone — the deliverability wins were a bonus. The API is a drop-in replacement."
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