The honest starting point
Callsy started the way most B2B companies start: with a problem we kept seeing across every D2C founder we talked to. Email recovery flows had plateaued at 6–8%. SMS was opt-in-friction-heavy. Voice. The channel that historically worked best. Was economically out of reach because every call required a human.
Modern neural TTS and real-time LLMs changed that math overnight. The technology was ready; the application layer wasn't. So we built it.
By month three we had paying merchants on Shopify recovering real revenue. By month six we were live in 14 countries and 40+ languages. That traction is what made the funding conversations productive. Not the deck, not the demo, the fact that real merchants were paying us monthly.
Why 500 Global
500 Global is one of the most active early-stage funds in the world. They've invested in 2,500+ companies across 80+ countries. We picked them for three specific reasons:
- Global distribution. Our customer base was already 14 countries deep in month six. We needed a fund that thought about scale-up across geographies, not just one home market.
- E-commerce + SaaS pattern recognition. They've seen this category cycle multiple times. Knowing what worked for Klaviyo, Postscript, and Triple Whale at our stage was more valuable than any term sheet bonus.
- Programmatic support. Beyond capital, the accelerator/scout network meant introductions to operators, follow-on investors, and other founders going through the same problems in week 2 vs week 8.
Why Firstpick VC
Firstpick is the Baltic + CEE early-stage specialist. They understand the founding context (Tallinn, Vilnius, the region's engineering depth, the EU regulatory environment) in a way that US-only funds simply can't.
Two specific reasons they were the right partner alongside 500 Global:
- Regional pattern recognition. The Baltic ecosystem has produced Bolt, Wise, Vinted, Pipedrive. Firstpick has seen this trajectory before and knows what to fund vs what to warn about.
- Compliance + EU AI Act fluency. We're shipping a regulated category (voice + AI + customer data) in the EU regulatory environment. Having an investor who understands GDPR / EU AI Act / data residency at a deep level meant fewer foundational re-architecture conversations later.
The accelerator process. What we actually learned
Three things we'd tell any founder going through this:
- Traction beats deck. We rewrote the pitch deck four times. None of those edits moved the needle as much as adding one customer's verified recovered-revenue number (Neurogena's $21,546 from $698 in calls) to slide 3.
- Pick partners, not funds. The fund name is the bumper sticker. The actual relationship is with one or two specific partners. Spend the diligence time on whether THAT person is the one you want in your board calls for the next five years.
- Don't optimize for valuation in the seed. Optimize for the people. We left some valuation on the table by picking 500 Global + Firstpick over higher-numerical offers from less-aligned funds. Best decision of the year.
What's actually changed since the close
The substantive things we didn't see coming:
- Hiring quality jumped. Sharing the investor names on outbound recruiting messages doubled response rates from senior engineers and growth operators.
- Customer trust signal. "Backed by 500 Global" on the about page measurably reduced friction in the Shopify+ and mid-market deal cycle. Procurement teams in the US treat it as a third-party validation marker.
- Compounding intros. Every portfolio company introduction has produced something. A customer, a hire, a peer-debug session. The network is the thesis.
What we'd tell pre-funding founders
If you're at the stage we were 12 months ago. Building something real, talking to customers, deciding whether to raise. Three pieces of plain advice:
- Get paying customers before you get investors. €2K/month in recurring revenue from real customers buys you more leverage than a pre-seed term sheet ever will.
- Talk to portfolio CEOs before you accept any term sheet. Ask them: "what's the worst thing about working with this fund?" The answer tells you more than any pitch back.
- Don't apply to every accelerator. Pick the 2–3 that genuinely fit your category and stage. Spam applications signal nothing; targeted ones with warm intros do.
What's next
We're a small team with one job in 2026: keep being the easiest way for an e-commerce founder to add AI voice to their cart-recovery, win-back, and customer-outreach flows. The capital lets us hire faster, expand the language coverage, and ship deeper integrations across the stack. None of that changes the core thesis. Voice is the most underused channel in e-commerce, and it pays for itself in week one.
If you're building in the same space, or thinking about funding for a category like ours, we're always open to compare notes. Reach me directly at arunas@callsy.ai.