EthCC Cannes 2026 recap: valuable insights

ETHCC 9 in Cannes (France) was four packed days of high-signal talks, side events, and the kind of builder energy that reminds you why Ethereum keeps compounding.

If you’re looking for the short version: DeFi is getting more modular, privacy is getting more practical, and wallet UX is still the hardest part of “shipping the future.”

What is ETHCC 9 (and why it matters)?

ETHCC (Ethereum Community Conference) is one of the biggest annual Ethereum events in Europe, bringing together protocol teams, wallet builders, researchers, founders, and infrastructure operators.

ETHCC 9 mattered because it showed where the ecosystem is actually investing effort right now:

• DeFi architecture upgrades that make real-world integration more plausible
• Zero-knowledge proofs (ZK) moving from “cool cryptography” to “usable credibility”
• Wallet standards and EIPs colliding with hardware constraints and ecosystem politics
• A clear split between what end users want (privacy + ease) and what power users want (features + control)

ETHCC 9 highlights: talks and panels worth stealing ideas from

Stani Kulechov (Aave): Aave v4 and the “Hub & Spoke” shift

Stani Kulechov announced Aave v4 during DeFi Day, and the architectural direction is the real story: a Hub & Spoke model where “Vault Spokes” can exist outside the core protocol.

In plain English: collateral doesn’t necessarily have to live inside the main Aave pools to be usable.

Key takeaways:

• More flexible collateral relationships than the classic “deposit → lock → borrow” flow
• Potential path to real-world asset (RWA) integration and hybrid custody setups
• The unlock is real, but the adoption depends on ecosystem actors implementing Spokes

Aave V4 goes live on Ethereum today, just announced by @StaniKulechov at the DeFi Day event, which this year is hosted by @EthCC in Cannes 🇫🇷

As far as I understand, the architecture is a meaningful shift: V4 introduces a Hub & Spoke model, where “Vault Spokes” can exist outside… pic.twitter.com/hyy2J5HqCQ

— superKalo.eth (@0xSuperKalo) March 30, 2026

Dana Condrea (ZKWhistleblower): anonymous credibility without identity leaks

One of the most practical privacy talks: zkWhistleblower tackles a brutal tradeoff whistleblowers face:

• Stay anonymous → risk being ignored
• Verify identity → risk retaliation

Their approach uses zero-knowledge proofs to let someone prove “I belong to this organization” without revealing who they are (or exposing message content).

Why this matters:

• It’s privacy as a solution to a real problem, not a feature checkbox
• It upgrades credibility without requiring doxxing
• It’s a strong alternative to traditional “trust me” verification flows

Vitalik (remote): privacy and security need to be full-stack (or it doesn’t count)

The recurring theme: privacy and security aren’t “features.” They’re problems to solve end-to-end. And privacy should be the default, not optional.

The full-stack view showed up everywhere:

• Cryptography and core tooling
• Wallet UI and application UI
• RPCs and infrastructure
• Onchain and network layers
• And the human layer (PEBKAC)

This framing is useful because it kills the common failure mode: “the protocol is secure, so the product is secure.”

Our talk at ETHCC: shipping EIP-7702 in a wallet is not “just implement the spec”

Kaloyan “Kalo” Kosev (goodmorning) took the ETHCC stage with a candid builder talk: “EIP-7702 meets hardware wallets: stories from the browser extension wallet frontlines.”

A few practical takeaways:

• The biggest challenges aren’t technical - they’re conceptual and communicational
• There’s still a lot of confusion around EIP-7702: delegating to a contract is often misunderstood as giving up control, and some assume dApps gain new powers over user accounts
• Hardware wallets can act as gatekeepers when it comes to adopting new standards

Like other big conferences, a lot of the best talks and panels happened simultaneously. If you wanted to catch more sessions, you often had to choose between them.

Luckily, EthCC handled this well: Kalo’s talk was live-streamed, and the recording is now available on the conference’s YouTube channel, so you can watch it anytime: ETHCC YouTube livestream recording.

Nadya on Web3 marketing: bug bounties as a marketing expense

A sharp marketing take that didn’t feel like marketing:

• Bug bounties buy visibility
• They turn hackers into advocates (if you have a real security culture)
• They reduce the chance of PR disasters

Galaxy brain take by @nadia_iv at @EthCC: bug bounties are a marketing expense

- free visiblity
- hackers become advocates and love you, especially if you have a strong security culture
- prevent PR disasters pic.twitter.com/dA6L0XAJGv

— Ivo 7702/acc (@Ivshti) March 31, 2026

Side events recap: the main stage was the warm-up

WalletCon continues to be one of the most relevant side events if you care about UX, standards, and what wallets are actually shipping.

Ivo Georgiev (Ambire’s CEO) gave a great talk that asked a genuinely big question: “Can we (and should we) replace hardware wallets?”

Builder Nights by MetaMask started with a long queue, but once inside it was one of the strongest side-event atmospheres of the week: a packed room, high energy, and plenty of space to move between conversations - wallets, infra, product, and whatever people were actually shipping.

That queue was no joke 😅

But Builder Nights by @MetaMask was 100% worth it - packed room, solid conversations, and builders everywhere ⚡

Great meeting so many like-minded people and feeling the excitement for what’s ahead in Web3. pic.twitter.com/k3FrLEqbQS

— goodmorning (@goodmorningdevs) March 31, 2026

On the smaller-but-sharp end, B€€R. Euros. DeFi. focused on EUR stablecoins - exploring what a euro-denominated onchain economy could look like, and what’s still missing for EUR in DeFi to feel real. Taxation of everyday crypto payments also came up as a hot topic.

Cannes as a conference location: surprisingly close to perfect

Cannes might be the best “conference logistics” location we’ve experienced so far:

• Side events at walking distance
• Main venue stages felt dialed-in (sound/visuals)
• Smooth entry flow (self-check-in kiosks, fast security)
• Talks ran on time with a schedule that was actually enforced

A small practical tip for attendees: plan for food outside the venue - on-site options were limited and lines got long, especially around peak breaks.

Merch and activities that got people talking

Instead of the usual conference swag, this time around we brought Crypto Fortune Cards - a slightly mystic, tongue-in-cheek twist that genuinely pulled people in.

Buy the dip or miss the run,
your @EthCC fate has just begun.

See @goodmorningdevs around?
Grab a 🔮 Crypto Fortune card and test your luck. pic.twitter.com/bWHCoU0Zfw

— goodmorning (@goodmorningdevs) March 31, 2026

ok - the boy is gonna be a CVO

2bil sounds juicy - 0 TVL because I am gonna eat it all

hehe - you know bear market vibes be like pic.twitter.com/nDMSasOPwR

— gaurang.eth (@iamgaurangdesai) April 2, 2026

On the Ambire side, one of the standout initiatives were the Cannes walking tours they organized. What started as a simple idea turned into something much bigger - a lot of people joined, and the feedback was overwhelmingly positive.

It turned out to be an easy, natural way to meet others, without the usual “networking” pressure.

This is how the free walking tour of Cannes at @EthCC looks like

Two more left, starting at the red carpet:
Tomorrow, 10 AM: https://t.co/G6wZr4JErX
Thursday, 10 AM: https://t.co/XXEInzOxhm

We want to show you all the absolute cinema of Cannes, but groups are capped at 50, so… pic.twitter.com/r7LDS5Q6Vb

— ambire.eth (@ambire) March 31, 2026

Conclusion: best ETHCC so far

ETHCC 9 felt like the most complete version of the event: strong content, strong production, and a builder-heavy crowd.

The big signal: Ethereum is still iterating on the hard problems - modular finance, usable privacy, and wallet UX - and the people in the room are shipping, not just talking.

Can’t wait for next year.