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Sideways CRM

London, United Kingdom
5.0 (21)
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+ setups since 2023.

Your network is already your edge. I build the system that puts it to work.

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What I do

✓ New Attio setups, designed around how your firm actually works

✓ Migrations from Salesforce, Airtable, HubSpot, Affinity, other systems or spreadsheets

✓ Deal sourcing, live enrichment and intelligent matching

✓ AI workflows and automated data capture

✓ Investor and network communications

✓ Audits and rebuilds of workspaces that never quite landed

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🗲 How it works

A scoping call, then a short paid audit with clear recommendations. This provises you with a sequenced plan forward, credited against any project. From there: Setup, Build, and an ongoing partnership to keep it sharp.

You work directly with me. Founding Attio Expert Partner, senior judgement on every decision, no developer to manage.

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✨ Who it's for

M&A advisors, VCs, PE, family offices, brokers and boutique advisory - anywhere deals come from relationships.

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Curious how I think about systems? Read The Dealmakers OS - the case for a system that captures everything, surfaces what matters, and compounds with every conversation.

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 (21)
Write a review
Attio Expertise That Took Our CRM to the Next Level
5.0
Sep 09, 2026
Mason McVerry, Mamba Growth
We began working with Will after trying to manage our Attio setup and development internally. As a heavy outbound investment firm, we needed granular visibility into our activity and pipeline. Will took the time to understand our organization and built dashboards and tracking mechanisms that took our CRM to the next level. He was responsive, thoughtful, and delivered exactly what we needed. I would highly recommend Will and his team!
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.