Sesame Summit 2026 – application open

The hidden costs of events: Why founders get the math wrong

Most startup founders treat events like they’re going travelling: count the days, block the calendar, done. But event tickets don’t come cheap, and the actual affair can eat into your budget in so many different ways, you’ll be left with a hole in your company wallet.

You see, the problem here is a simple case of math: one can’t budget for unforeseen expenses. That’s why we’ve put together a simple formula that founders can tweak to suit their business needs.

The 2:1 rule nobody talks about

Here’s a simple rule: Every single day at an event requires two full days of preparation. This isn’t bureaucratic overhead, it’s the operational reality of doing events properly.

Why does this ratio work? Because events operate on a timeline that’s fundamentally incompatible with how startups work. Most conferences lock speaker slots, booth spaces, and partnership opportunities months in advance. You can’t A/B test them or sprint your way in at the last minute.

Scaleups and corporates have dedicated field marketing teams who start preparing months in advance for events. They’ve already mapped the venue, scheduled meetings, and briefed their booth staff. If you show up with two hours of prep, you’re invisible.

But why should you set aside two days for every event day? You’ll fill them with research, targeting, outreach, scheduling, content, positioning, logistics operations, internal coordination, and post-event planning. 

You can’t change your pitch deck the morning of your panel. Events punish improvisation because the stakes are live and all opportunity windows close fast. That’s why a 2:1 ratio is the minimum buffer you need to make showing up worthwhile.

A three-day conference isn’t a three-day commitment; you’ll have to set aside at least six days before factoring in travel, team coordination, or what you’ll actually do at the event. Treat it as the baseline for local events that you’re only attending, too.

And when you add distance, team members or booth logistics to the equation, that number explodes.

The winning formula

Here’s what no event organizer will tell you upfront:

Total Time = (Event Days × 2) × Distance Factor × Team Factor × Activity Factor

blank

Distance multipliers

  • Local event (same city): 1.0x
    • Minimal travel disruption. You sleep in your own bed.
  • Domestic travel: 1.2x
    • Add a buffer for delays, early departures, travel recovery.
  • International: 1.5x
    • Factor in time for visa prep, time zones, cultural adjustment, and jet lag recovery.

Team size factors

  • Solo founder: 1.0x
    • You control your schedule, but you’re also doing everything yourself.
  • Two to three people: 1.3x
    • Account for coordination overhead: briefings, role assignments, post-event debriefs.
  • Four or more: 1.8x
    • Now you’re managing a small delegation, so account for logistics taking up a few hours of your days.

Activity type factors

  • Attending only: 0.8x
    • Passive participation means lighter prep, but also lower ROI potential.
  • Speaking: 1.2x
    • Account for deck prep, rehearsals, and Q&A planning. Public visibility demands polish.
  • Exhibiting: 1.5x
    • You’ll need to plan for booth design, swag logistics, staff training, and your lead capture setup. This is a campaign, not a trip.

What does it look like in the real world?

Let’s run an example scenario: Say you’re exhibiting at Web Summit with two co-founders.

  • Event duration: 3 days
  • Location: Lisbon (international for most European startups)
  • Team size: 3 
  • Activity: Exhibiting

Calculation:
(3 days × 2) × 1.5 (international) × 1.3 (team of three) × 1.5 (exhibiting) = 17.6 days

That’s nearly four working weeks of founder time. Not calendar days — productive working days. An entire sprint. A fundraising cycle. A product release window.

That’s before you account for the inevitable chaos: marketing materials might get delayed, or your booth might require a last-minute redesign, or one of your team might fall ill on day two.

This matters more than you think

Startups don’t fail because they attend too many events. They fail because they attended the wrong events and didn’t realize the true cost until it was too late.

Most early-stage founders operate on razor-thin runways and even thinner margins. Losing 17 days to the wrong conference can mean missing a critical hiring window, pushing a launch back by a quarter, or running out of cash.

The opportunity cost is immense.

Three filters to help you decide

Preparation is table stakes, but the real competitive advantage is selection. Before you commit to any event, run it through these three filters:

1. Are your top 10 target customers actually attending?

Don’t settle for “the industry will be there,” or “it’s a great brand.” Will the specific people who can write cheques or sign contracts be in the venue?

If you can’t name at least five confirmed attendees you want to meet, you’re engaging in speculation, and speculation is expensive.

2. Can you get time with decision makers?

Networking is not the same as dealmaking. Conferences are full of people collecting business cards and having “great chats” that go nowhere.

Look for pre-scheduled meetings, private roundtables, investor office hours, or curated dinners. If the event doesn’t facilitate structured access, you’re paying to work a room.

3. Does the timing align with your fundraising or launch cycle?

Attending a major event two weeks before a funding deadline is fundraising malpractice. Exhibiting at a trade show when your product isn’t ready to demo is theatre, not business development.

Timing isn’t everything, but mistimed events have the potential to burn capital and credibility in equal measure.

The real decision

Preparation is hard, but preparing brilliantly for the wrong event isn’t going to yield the results you’re looking for.

The formula above isn’t meant to scare founders away from conferences. If you’re going to invest 17 days of founder time, you’d better know exactly what ROI you’re chasing and have a plan to capture it.

Most founders wing it. The folks who don’t tend to be the ones still standing when funding dries up.

At Sesamers, we’ve spent years inside the event ecosystem, watching startups burn time and capital on conferences that looked good on paper but delivered nothing. The startups that survive and thrive aren’t the ones who attended the most events; they simply skipped those that weren’t relevant, and attended the right events at the right time, with the right preparation.

So before you book your next booth or confirm that speaking slot, do the math, and see if you can afford to go wrong.

blank

you might also like

Rift raises €4.6M for aerial reconnaissance platform
Fundraising 3 weeks ago

Europe’s defence technology sector is witnessing unprecedented investment momentum, driven by shifting geopolitical realities and increasing demand for autonomous surveillance solutions. At the forefront of this transformation sits Rift, a Paris-based startup that has just secured €4.6 million in Series A funding to build Europe’s first on-demand aerial reconnaissance network. The round was led by AlleyCorp, the New York-based venture firm known for backing enterprise technology companies. This investment signals growing transatlantic interest in European defence tech capabilities, particularly as NATO allies prioritise technological sovereignty and autonomous reconnaissance systems. AlleyCorp leads aerial reconnaissance funding round AlleyCorp’s decision to lead this round reflects a broader strategic shift among US investors towards European defence technology startups. The firm, which has previously backed companies like MongoDB and Paperless Post, sees significant potential in Rift’s approach to democratising aerial intelligence gathering across civilian and military applications. “Rift’s technology addresses a critical gap in the European surveillance market,” noted a spokesperson from AlleyCorp. “Their ability to deploy on-demand reconnaissance missions using autonomous systems represents exactly the kind of dual-use innovation we expect to define the next decade of defence technology.” The investment comes at a time when European governments are accelerating defence technology procurement, with the EU’s European Defence Fund allocating €8 billion for collaborative defence research and development programmes. This regulatory tailwind positions Rift advantageously within a market expected to reach €24 billion by 2027. Building Europe’s autonomous surveillance network Rift’s platform combines advanced drone technology with artificial intelligence to provide real-time reconnaissance capabilities across multiple sectors. Unlike traditional surveillance methods that require significant infrastructure investment, the company’s on-demand model enables clients to access aerial intelligence through a software-as-a-service platform. The startup plans to use the funding to expand its autonomous fleet and enhance its AI-powered analytics capabilities. With operations currently focused on France and Germany, Rift aims to establish coverage across major European markets by 2026, positioning itself as the continent’s primary alternative to US-based surveillance providers. “European organisations need surveillance solutions that comply with GDPR and other regional privacy regulations,” explained Rift’s CEO. “Our platform is built from the ground up with European data sovereignty in mind, something that resonates strongly with both government and enterprise clients.” This funding positions Rift to compete directly with established players like Palantir and Anduril, whilst offering European clients the regulatory compliance and data localisation they increasingly demand. As defence technology becomes increasingly intertwined with civilian applications, Rift’s European-first approach may prove to be its strongest competitive advantage.

energy infrastructure funding, grid technology investment, BESS funding
Fundraising 3 weeks ago

Europe’s energy infrastructure is undergoing its most significant transformation since electrification began. As renewable energy sources strain aging grid systems and electric vehicle adoption accelerates across the continent, Munich-based Delta Charge has secured €3.7 million to address critical gaps in energy storage and distribution. The funding round, led by Vireo Ventures and Rethink Ventures, positions the startup to capitalise on Europe’s urgent need for battery energy storage systems (BESS) and grid modernisation solutions. This investment reflects growing European investor confidence in energy infrastructure startups as the EU accelerates its transition to renewable energy sources. With the European Green Deal mandating carbon neutrality by 2050, the timing couldn’t be more strategic for Delta Charge’s market entry. Energy infrastructure funding attracts European climate tech investors Vireo Ventures and Rethink Ventures bring complementary expertise to Delta Charge’s growth trajectory. Vireo Ventures, known for backing transformative European climate technologies, sees Delta Charge as addressing fundamental infrastructure challenges that traditional utilities struggle to solve efficiently. Meanwhile, Rethink Ventures’ portfolio focus on sustainable technology solutions aligns perfectly with the startup’s mission to optimise energy distribution networks. “We’re witnessing unprecedented strain on European energy grids as demand patterns shift dramatically,” explains a Vireo Ventures partner familiar with the investment decision. “Delta Charge’s approach to battery energy storage systems offers the scalability and intelligence that Europe needs to maintain grid stability while integrating renewable sources.” The investor combination signals strong European institutional support for energy infrastructure innovation. Both funds have demonstrated expertise in scaling climate tech companies across fragmented European markets, providing Delta Charge with strategic value beyond capital injection. BESS technology targets European grid modernisation Delta Charge’s battery energy storage systems address acute European challenges that differ significantly from other global markets. The continent’s diverse regulatory frameworks, varying grid infrastructures, and ambitious renewable targets create unique technical requirements. The company’s technology optimises energy storage placement and management across these complex, interconnected networks. The €3.7 million funding will accelerate product development specifically for European market conditions and support expansion across key markets including Germany, France, and the Netherlands. Delta Charge plans to leverage regulatory tailwinds from the EU’s REPowerEU initiative, which prioritises energy independence and grid resilience investments. “European energy markets present both immense opportunity and distinct challenges,” notes Delta Charge’s leadership team. “Our BESS solutions are designed specifically for the regulatory complexity and infrastructure diversity that characterises European energy systems.” The startup’s technology addresses critical pain points including grid balancing during peak renewable generation periods and energy storage optimisation for commercial and industrial applications. With European electricity prices remaining volatile and grid stability concerns mounting, Delta Charge’s timing appears particularly astute. This funding round exemplifies the European venture capital community’s increasing focus on infrastructure-critical climate technologies. As European governments commit billions to energy transition initiatives, startups like Delta Charge are positioned to capture significant market opportunities whilst addressing urgent societal needs.

supply chain AI funding
Fundraising 3 weeks ago

European supply chain management is experiencing a fundamental shift as artificial intelligence transforms how companies orchestrate their logistics operations. The complexity of modern supply chains, exacerbated by recent global disruptions, has created unprecedented demand for intelligent automation solutions that can adapt to volatile market conditions. Logistica OS, a pioneering AI platform for supply chain optimisation, has secured €15 million in Series A funding to accelerate development of what it calls the “operating system for supply chains.” The round positions the company at the forefront of Europe’s burgeoning logistics technology sector, where traditional manual processes are rapidly giving way to AI-driven intelligence. Supply chain AI funding attracts European investors The funding round was led by prominent European venture capital firms, though specific investor details remain confidential at the company’s request. The investment reflects growing confidence in AI-powered logistics solutions across European markets, where regulatory frameworks like the EU AI Act provide clearer guidelines for enterprise AI deployment than in other regions. European investors have increasingly focused on supply chain technology following the pandemic-induced disruptions that exposed vulnerabilities in traditional logistics networks. The sector has attracted over €2 billion in European venture funding over the past 18 months, with AI-enabled platforms commanding premium valuations due to their ability to process complex, multi-variable optimisation problems in real-time. “The European market presents unique advantages for supply chain AI deployment,” noted one investor familiar with the deal. “Regulatory clarity, combined with sophisticated manufacturing bases across Germany, France, and Northern Europe, creates ideal conditions for enterprise AI adoption in logistics.” Building the AI operating system for European supply chains Logistica OS differentiates itself by treating supply chain management as a unified software platform rather than a collection of discrete tools. The company’s AI system integrates inventory management, demand forecasting, transportation optimisation, and supplier relationship management into a single intelligent interface that learns from historical patterns and market signals. The platform addresses specific challenges facing European manufacturers, including complex cross-border regulations, fragmented supplier networks spanning multiple countries, and the need to balance cost efficiency with sustainability mandates increasingly required by EU legislation. Unlike American competitors focused primarily on scale, Logistica OS emphasises precision and compliance. “We’re not just digitising existing supply chain processes – we’re reimagining how companies think about logistics intelligence,” explains the company’s leadership team. “Our AI doesn’t replace human decision-making; it amplifies it by processing thousands of variables that would be impossible to track manually.” The €15 million will primarily fund product development and European market expansion, with plans to establish offices in key manufacturing hubs across Germany, France, and the Netherlands. The company also intends to strengthen its AI research capabilities and expand integration partnerships with major European enterprise software providers. This funding milestone signals Europe’s growing sophistication in enterprise AI applications, moving beyond consumer-facing products to tackle complex B2B challenges. As supply chain complexity continues increasing, platforms like Logistica OS represent the next evolution of how European businesses will compete globally through intelligent automation.

Subscribe to
our Newsletter!

Stay at the forefront with our curated guide to the best upcoming Tech events.