Back to Directory
Advanced

Sideways CRM

London, United Kingdom
5.0 (20)
Accepting new clients
Founding Expert
Resources
Supported Regions
  • Americas
  • EMEA
  • APAC
Expert Location
  • EMEA
Languages
  • English
Expert Tier
  • Advanced

About Sideways CRM

The Attio specialist for Investors, Advisors & Brokers. 35 successful Attio setups since 2023.

Your network is already your edge. I build the system that puts it to work - the right conversations surfaced faster, the connections others miss made visible, and nothing lost.

For firms where deals come from relationships - investors, advisers, brokers, dealmakers - I help you capture everything (relationships, conversations, history, documents), surface the connections others miss, and turn it into a system that compounds the more you use it. Built around how your firm actually works, not a generic sales funnel.

You work directly with me, a Founding Attio Expert Partner who understands this world and owns the outcome - and brings in trusted specialists when the work calls for it, so you get senior judgement without ever managing a developer.

Every engagement starts with a free 20-minute scoping session, moving to a Project to Partnership model - a clear first build, then an ongoing partnership to keep it sharp. Tell me where you are and what you're trying to achieve, and I'll come back with clear recommendations and next steps.

35+ successful implementations across M&A advisors, brokers, consulting firms, investment funds, VCs and boutique advisory.

---

🗲 Request a free scoping session where we'll discuss your current setup and ambitions for Attio. You'll leave with clear recommended next steps.

---

↳ Visit my website to learn more and get in touch

Media

Will Sawney, Founder Of Sideways
Capture. Surface. Compound.
The Connections Others Miss
Built around how your firm actually works.
The whole network, working as one.
Bespoke design, not off-the-shelf.

Case Studies

Corporate Finance - A Bespoke, AI-Assisted Attio
Brokerage Firm - Platform Migration For Deal Flow
Boutique Investment Accelerator - Complete Firm OS

Clients

Phoenix
Astria Elevate
Co-Gency Corporate Finance
Tallgrass Ventures
My Art Broker
Freedom Ventures
Reviews
5.0 (20)
Write a review
Excellent experience working with Will
5.0
Jul 22, 2026
Jess Bromovsky, MyArtBroker
Will helped us transition from our previous CRM and implemented a custom Attio setup that was perfectly tailored to our business. He couldn't have been more helpful throughout the entire process - guiding us every step of the way, solving problems as they arose, and taking the time to understand the unique needs of our company. His expertise made what could have been a very complex migration feel achievable!
Will is brilliant!
5.0
Jul 17, 2026
John Morse-Brown, Pigeon
Will helped me set Attio up for my specific needs, so it does what I need it to do out of the box. He's been brilliant to work with, and has tweaked and refined things till they worked just how I wanted them to. Highly recommend him.
Trusted AI CRM Partner
5.0
Jun 05, 2026
Ben Brierley, Co-gency Corporate Finance
Working with Will was a great experience from start to finish. He helped us build an AI CRM system in Attio that integrates with our other systems exactly as we wanted. No question was ever too much trouble, and he was always willing to explain things and find solutions. He’s trustworthy, highly knowledgeable, and genuinely focused on helping his clients succeed. I know I can count on him for any future updates or improvements.
Sideways CRM x Attio Build
5.0
May 19, 2026
Matt Peacock, The Optimised Coach
Will has been outstanding from the very beginning. Taken time to deeply understand my requirements and tailored the whole thing to suit. Cannot recommend enough.
Excellent Support, Great Delivery.
5.0
May 15, 2026
Andy Wertheim, Quvara Medical
Are there enough positive adjectives to describe how Will has helped us? He's a responsive, knowledgeable, cost-effective expert with Attio and how it can be built, integrated, and made bespoke to our needs. 100% recommended.
Attio setup, automations implemented
5.0
May 09, 2026
Luke Smoothy, Get It Made Ltd
We worked with Will from Sideways CRM to help us get up and running with our Attio CRM. We sort of knew what I wanted, but quickly found a needed some expert help. So we contacted Sideways. Will helped us integrate Xero so quotes and invoices were visible to the correct companies in Attio. Will ironed out a lot. We communicated via slack, he had a client portal for visibility, and we had regular calls. Would strongly recommend!