The 12 best tech conferences in London for Q2-Q3 2026

Right. Q2-Q3 2026 in London is conference-dense — alot more than 2024 was, alot more than the post-pandemic lull. The supply is back, the question is which tickets are actually worth £400-1,500 and which are LinkedIn-summit spam. After a year of working the circuit and asking other operators what shipped, here's the twelve I'd genuinely consider.

For the live calendar, the London conferences page does the aggregation work.

The single best tickets

AI Engineer Summit London is the spine of the 2026 conference calendar for anyone shipping AI products. Practitioner-led, dense speaker line-ups, real workshop content. The single best applied-AI conference in Europe right now. Worth every penny of the ticket.

Sifted Summit London is the European founder conference flagship. Strong UK and European founder representation, real investor presence, the side-event circuit is dense. Worth the ticket if you're a generalist founder. The "first conference of the year" for many UK operators.

Config London when Figma brings it through is the densest design-tech room of the year. The design-engineering track specifically is mega — the cohort of senior design engineers shows up in numbers.

The curated tier

AI House Summit London is the curated alternative to the bigger AI conferences. Smaller, invite-application, founder-and-investor flavoured. The line-up reliably pulls senior speakers from the major labs and the European model labs. Apply with substance.

Founders Forum London is hard to get into, the room is genuine. Less of a "conference" and more of a curated gathering. Apply only if you're a serial founder or have a strong angle. Generic blurbs filter out fast.

The vertical specialists

Money 20/20 Europe when in London is the fintech conference flagship. Pay the ticket if fintech is your domain. Less useful for generalists.

FT Banking and Tech Summits are FT-led with strong policy and senior-operator content. Paid and pricey but the content is alot more substantive than the typical industry conference.

O'Reilly Strata-style data conferences when they come to London are technical-depth-heavy. Pay the ticket if data engineering is your domain.

JSConf / FrontendConf London is the serious frontend developer conference circuit. Technical depth, less marketing fluff, properly substantive talks.

The festival-format options

CogX Festival London is AI-and-tech festival format. Mixed quality across years but the AI track has been consistent. The honest move is to skip the main festival pass and work the side events.

Web Summit London when running is bigger production, broader audience. Useful for one-shot dense conference week. Lower density per attendee than the smaller conferences.

TNW Conference London-adjacent events are broader founder and tech-press crowd. Worth a day, not necessarily a full ticket.

How to actually work a London tech conference

A few rules that work across the lot:

• Pick three specific people you want to meet. DM ahead. Serendipity hits when you have a baseline plan.
• Skip the headline keynotes. The genuinly useful conversations happen in the corridor and at the receptions.
• Block one full day after the conference for follow-up. Most of the ROI is in the post-conference DM, not the in-event meeting.
• Don't pitch in the first sentence. The "I'm raising £2m" lead-in marks you as junior.
• Skip the conference-organised parties for the side events. The official parties are too big to be useful. The smaller side events have the right density.
• Bring business cards. Yes, still. Especially at the international-flavoured conferences. The follow-up rate is higher.

What I'd actually attend across Q2-Q3

If I were running my own playbook for Q2-Q3 2026:

• AI Engineer Summit London (foundational ticket if you ship AI)
• Sifted Summit London (broad founder signal)
• One AI House Summit if I could get into one
• Config London if I cared about design-engineering
• Money 20/20 Europe if fintech is my domain
• Skip everything else unless I have a specific person to meet

The "go to every conference" approach burns budget and attention. The right move is two-or-three foundational tickets and selective side-event attendance for the rest.

What to skip

A handful of patterns that filter out:

• LinkedIn-spam "Innovation Summit" branded events. The speakers are mostly Director-of-Innovation-at-Tier-2-Bank.
• Conferences with no real practitioner content — pure thought-leadership stages.
• "Exclusive" conferences charging £2,000+ for "access" to investors. The investors worth meeting do not work this way.
• Conferences where the speaker list is mostly people from the organising company.

The discovery problem

Finding the genuinely good London tech conferences is harder than it should be. The Eventbrite spam, the LinkedIn invitations, the Sifted newsletter, the FT Tech newsletter — all hold pieces of the picture. This is honestly why the London conferences feed on Rifio aggregates them — saves the cross-platform search.

For the live calendar, the feed above is the cleanest aggregation. The Q2-Q3 2026 calendar is dense — pick well, skip the LinkedIn-summit spam.