Mailbird: a desktop email app for Windows and Mac that grew to $170K a month on SEO

Mailbird sells a desktop email client for Windows and Mac that unifies multiple email accounts in one workspace for heavy email users and people who want something simpler than the mail app they came from, and it was doing $170K a month in revenue that founder Michael Olsen reported himself in the August 2024 Starter Story interview.

How it started

Twelve years before that interview, Olsen started Mailbird with his Danish business partner Michael Bodekaer. The gap was narrow and concrete: Mac users had Sparrow, but Windows had no comparable modern alternative, and what the pair had in mind was a plain, clutter-free email hub.

Before Mailbird, Olsen had been an app developer at Smartlaunch, a gaming center software provider, and co-founder and sole engineer of Room Service, a food delivery company. Getting Mailbird going was funded by savings from that period plus a seed investment of $150,000; the interview put the total cost of starting at $170,000. The first two engineers hired, Dimas and Abraham, were still with the company when he spoke. The team worked fully remote from the beginning — Olsen in Copenhagen, the engineers in Indonesia — at a time when there were far fewer tools to support that setup.

Timing helped too. Google had just acquired Sparrow, so coverage of the launch framed Mailbird as the "Sparrow-like email client for Windows," and that landed it in TechCrunch, Lifehacker and PCWorld.

What it sells and how it charges

getmailbird.com describes Mailbird as a powerful desktop email client for Windows and Mac that unifies Gmail, Outlook, Exchange and IMAP accounts in one workspace, works with any IMAP/SMTP email account, and integrates with 30+ tools.

Pricing and plan details as fetched on 2026-09-30:

Plan	Price	What it includes
Free	A$0.00	1 account, Knowledge Base support
Premium Yearly	A$4.13 / user / mo, paid yearly (listed as A$8.25)	Unlimited accounts, VIP customer support, unlimited email tracking, email templates, custom apps, block sender, filters/rules
Premium Pay Once	A$149.75 / user (listed as A$599.00)	Same advanced features, plus an additional free Premium license

Two paid add-ons appear at checkout: Leave Me Alone features for A$89 and lifetime updates covering all future versions for A$99. All plans include a 14-day money-back guarantee, and Mailbird for Mac requires macOS Ventura or later.

On buyers, Olsen described two groups: heavy email users managing three or more accounts who want everything in one inbox, and non-technical users who choose Mailbird for its simplicity and run it for personal email.

How it got its first customers — and what kept growth going

Early validation came from press rather than spend. Olsen said he wasn't sure the direction was right until TechCrunch covered the company: "The article generated so much traffic that our website ended up crashing."

What followed came in three parts in his account: PR at launch so relevant media knew the story; SEO built around high-intent keywords, including comparison articles aimed at people already looking for an alternative to their current email client; and a persistent push for genuine user reviews, which he called key to the business because third-party validation helped prospects learn about the product.

The mix he described at the time was SEO, paid search, PR and word of mouth, with the breakdown at 60% SEO, 30% paid search and 10% PR. Paid search stayed limited deliberately: each keyword's cost and Mailbird's unit economics set what could be paid per click, the target CPC was small, and bigger indirect competitors were pushing prices up. On search, his line was short: "SEO is the biggest one because it's the one that best fits our unit economics." By the time of the interview that work was bringing more than 150,000 visitors a month from Google alone, about 75% of total traffic, and driving over 20,000 installs per month.

He also named decisions that turned out better than expected: multi-dimensional SEO projects, bringing the free version back after removing it for a while, the welcome banner, and the Mailbird 3.0 launch. The dependence cuts both ways. Google core updates have hit the business, and when an integrated tool changes in a way that hurts the experience, a replacement has to be found quickly.

The numbers

Metric	Figure	Basis
Revenue	$170K a month	Founder-reported in the August 2024 interview
Employees	28	As stated at that interview
Founders	2	Olsen and Bodekaer
Based in	Palo Alto, CA, USA	As stated in the interview
Cost to start	$170,000	Savings plus a $150,000 seed investment
Average customer lifetime value	about $120	Founder's figure
Longer-run trend	revenue up 35x since 2015; almost 50% growth year over year	Founder's own description

These are the founder's statements made at that date, not current figures. The product and pricing details above come from the official website as fetched on 2026-09-30 and sit on a separate timeline from the interview numbers.

How it compares

In 1M.chat's own analysis of 1,997 businesses with founder-reported revenue in Starter Story interviews covering 2015 to 2026 — a self-selected sample of founders who chose to be interviewed, not a random sample of all businesses — 354 sit in Software & SaaS. Within that category:

Median monthly revenue: $40K
Share reporting $1M a year or more: 35%
Median employees: 4.0
Share started by one founder: 45%
Among the 244 businesses with channel information: organic social media 55%, SEO and organic search 54%, word of mouth and referrals 31%, paid ads 31%

Against that backdrop, the revenue Olsen reported was about four times the category median, while the team of 28 sat well above the median of 4.0 employees and the company had two founders rather than one. Leaning on search also fits the wider category pattern, where SEO and organic search appear in the majority of cases that disclosed channels — though this kind of sample describes what founders reported after the fact and says nothing about what any individual business will reach.

What a founder can take from it

Choose the channel that fits unit economics rather than the one currently fashionable. SEO became the largest channel here because its cost per install worked at their price point, while paid search stayed small because competitor bidding pushed keywords past what each customer was worth.

Build for the moment someone leaves a competitor. Comparison content aimed at "alternative to X" searches targets existing intent and can be tested without first building brand awareness.

Treat a free tier as distribution rather than lost revenue. Removing and later restoring the free version is listed here among the decisions that worked better than expected, which is worth weighing against how a free account feeds the paid path.

Collect third-party validation on purpose. Coverage and genuine reviews were named as reasons prospects found the product; neither arrives overnight, and neither is a lever available on launch day alone.

Plan around the dependency being created. When most traffic flows from Google, core updates become a business risk, so a second channel deserves groundwork long before it is needed.

Sources

Revenue, team and start-cost figures are what the founder reported at the interview date, not current figures and not a prediction of what you will earn. Product and pricing facts come from the business's own website as checked on 30 September 2026. Method & sources · Disclosure