B2B Companies × Lisbon
Best AI Agencies for B2B Companies in Lisbon (September 2026)
Lisbon agencies with verified B2B client evidence — ranked by depth of documented work, then editorial quality.
Each listed agency evidences at least 2 documented B2B clients. Combined, the agencies below document 19 client engagements.
Ranked agencies for B2B clients
Rankings updated · Newest review
DareData
#1Lisbon, Portugal
Client evidence: 10 documented clients overall
Best for: Enterprises automating a high-volume back-office or support workflow, with the NOS and Heineken deployments as the reference pattern.
BySix
#2Lisbon, Portugal
Client evidence: 5 documented clients overall
Best for: Product and operations teams buying a first generative-AI agent wired into Jira, Slack, Shopify or an ATS at a fixed weekly price.
Twistag
#3Lisbon, Portugal
Client evidence: 2 documented clients overall
Best for: Operators with a document or workflow bottleneck that needs an agent auditable enough for finance or compliance to delegate to.
Altar.io
#4Lisbon, Portugal
Client evidence: 2 documented clients overall
Best for: Funded founders building a regulated fintech or commerce product who want engineering that carries them to the next raise.
About this list
The strongest thing about this page is that its evidence is checkable, and the second strongest is that the four firms measure different things. Twistag publishes the mechanism: an accounts-payable agent at the manufacturer Aralab where Claude reads any supplier PDF and deterministic code independently recalculates every line against the purchase order, with per-invoice cost traced in real time. DareData publishes the volume, running roughly two thirds of a telco's supplier invoices end to end. bysix publishes the turnaround, including a 96 percent cut in listing time for an e-commerce client. Altar.io publishes the client's outcome instead—funding raised, awards won, headcount grown—which tells you about the product but not about the engineering.
For a B2B buyer that difference is the shortlist. A mechanism you can inspect survives an audit; a volume figure proves the thing runs at scale; a funding round proves neither. Ask for whichever your own risk requires, and ask it specifically, because all four will answer warmly and only some of the answers will be about the system. Then ask what the running cost per transaction is—one firm on this page makes that visible by design, which is a reasonable thing to expect from the others.
Intro by Gabor Kiss, curator · How we rank
Expert Insight
Why B2B fit matters
B2B AI lives inside operational systems, so integration experience is delivery experience—an agency that has shipped into an ERP or a ticketing queue has already fought the battles your project will fight.
Operational outcomes are checkable in a way marketing outcomes are not: handle time, error rate and hours removed either moved or they did not, and the strongest agencies here publish those numbers.
The internal business case matters—an agency whose case studies quantify results gives your sponsor the numbers to defend the budget with.
Frequently asked questions
4 agencies in our directory combine verified B2B client evidence with a Lisbon base. The current top-ranked are DareData, BySix, Twistag — ordered by depth of documented client evidence, then our editorial scoring (portfolio quality, credibility, completeness); placement is never paid.
Published rates across this page's agencies run €45–85 per hour (median ~€65). Project totals depend on scope — the rate index at /rates breaks the computed bands down by region, country and team size.
Each listed agency has at least two documented, named B2B clients — published case studies or engagement descriptions our research actually read, with source URLs stored per client. Logo walls without published evidence carry no weight, which is what separates this list from self-declared directories.