Koltrix
Startups
Email for Developer-Tool Startups: Keys, Changelogs and Docs
Developers ignore marketing email but read messages that save them from outages. The emails a dev-tool startup should send, how to write them, and what to skip.
5 min read
StartupsEmail for EdTech Startups: Planning Around the School Calendar
EdTech email follows the school year: back-to-school bursts, quiet summers, renewal season and several audiences. How to plan sends, volume and tone around it.
4 min read
ComparisonsDedicated Lifecycle Email Tool or In-House Code? How to Decide
Buying a lifecycle messaging platform or writing onboarding and trial emails in your own code: who owns copy, testing and cost on each side, with a checklist.
5 min read
ProductMeasuring Lifecycle Emails With Koltrix Delivery Events
How to use Koltrix webhooks and message events to measure onboarding, trial and dunning emails by what users do next, not by open rates you can't trust.
5 min read
StartupsReferral Program Emails: Asking at the Right Moment
Ask for referrals right after a customer succeeds, not at signup. The three emails a referral program needs, when to send each, and what to avoid.
4 min read
StartupsPlain-Text vs Designed Emails for SaaS Lifecycle Mail
Plain text feels personal and renders everywhere. Designed HTML suits receipts and digests. Which lifecycle emails belong in which format, and why.
4 min read
- Guides
Sending Lifecycle Emails From Your Own Job Queue
For founders who code: build onboarding and trial emails with an events table, a scheduled job and an email API, with idempotency and suppression built in.
5 min read
StartupsFreemium Upgrade Emails: Moving Free Users to Paid Without Nagging
Freemium has no deadline, so upgrade emails must be triggered by value and limits, not dates. Which triggers work, what to write, and when to leave users alone.
5 min read
StartupsLifecycle Email Metrics That Matter (and Vanity Ones to Drop)
Open rates stopped meaning much once mail clients began prefetching images. The lifecycle email metrics worth tracking instead, email type by email type.
5 min read
- Startups
Plan-Limit Emails: Prompting Upgrades Without Breaking Trust
Telling customers they're near a plan limit is a moment of trust. When to warn, what to show, what happens at 100%, and how to suggest an upgrade calmly.
4 min read
ComparisonsCampaign Builder or Email API? Where SaaS Lifecycle Mail Should Live
Campaign builders and email APIs solve different halves of lifecycle email. Who should own onboarding, trial and billing mail, and when a hybrid setup works.
4 min read
StartupsUsage Milestone Emails Customers Actually Like
A well-timed milestone email reminds customers what your product did for them. Which milestones are worth celebrating, how to make them useful, and how often.
4 min read