Gregory has been enormously helpful to steer the business to the right direction. In a short session with him, he sees the problem with the business and identify bottlenecks - and tell you the probl... See more
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Greg's advice struck the perfect tone for me. He's extremely knowledgeable, but doesn't shove it in your face. He provides really well-tailored advice, personalised for each business, because he knows... See more
It was only an hour-long session, but packed with valuable insights and actionable advice. He highlighted what’s important for us to focus on right now, rather than getting sidetracked by the wrong th... See more
Gregory gave me some excellent advice on how to grow my budding business. He asked me some candid questions and made me completely reconsider my approach - I realise now that I was going down a dead e... See more
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Company details
Written by the company
ThinkWork helps companies scale revenue by turning early sales traction into a predictable, repeatable commercial engine. We work with teams where sales exist but performance is inconsistent and difficult to scale. Using AI-driven analysis of real sales activity, we diagnose what’s actually happening and rebuild the commercial system to make performance repeatable in weeks, not quarters. Operator-led, hands-on, and focused on execution, not theory.
Contact info
66 Paul Street, EC2A 4NA, London, United Kingdom
- greg@thinkwork.info
- thinkwork.info
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Very practical advice
I was very grateful to Greg for an hour of his time. Very useful insights and perspectives on tactics for how to grow my start-up business. No nonsense. No theory. Just practical advice.

Reply from Greg Mccallum - ThinkWork
Great Clarity & Understanding of Marketplaces
Coming to Greg, we had a very quick but "full" chat about my business and everything surrounding it. Greg did a great job in understanding it and asking key questions that aimed to rock the boat in my understanding of our current position and where we are moving. These were great as it's important to stay in the know with these!
When it came to me asking questions, I only had one, regarding our marketing strategy. Greg gave very sound advice which clarified a lot for myself and gave a clearer picture of what can be done moving forward. Overall Greg seems like a great guy and has a lot to give in advising Startups (specifically marketplace startups).

Reply from Greg Mccallum - ThinkWork
Great Business advices re. SaaS pricing
I had the great privilege to talk to Greg in a 30 min free business meeting. My topic was SaaS pricing. Greg really had some fantastic views and ideas on how I could offer a SaaS pricing model for my customers.
Greg was very helpful and an open person - and great business mindset.
Looking forward to getting more experienced.

Reply from Greg Mccallum - ThinkWork
A fresh perspective
I had a free hour with Greg today to discuss my business and where I want to take it, what I think the problems are, and to hear his take on it.
I was interested that he had a rather different view on what the issues are AND on what to do about them, which has kind of flipped things around for me in a very useful way.
I feel like I can build a strategy from what we discussed, and although it means doing stuff I'm less at ease with (videos being one!), I look forward to translating into actions and results.
Definitely recommend taking him up on the Free Hour consultation. He won't sugar coat things, which was fine for me. What's the point of a Yes man anyway?! Greg is certainly not that, but if you want to come away with a fresh perspective and ideas you may not have considered, what do you have to lose except an hour of your time?

Reply from Greg Mccallum - ThinkWork
Highly recommend
Listened well, asked the right questions to understand my goal, and was able to create a clear and concise plan to advance my product through the marketing stage.

Reply from Greg Mccallum - ThinkWork
Felt like getting punched in the face
Greg comes across as bull in a china shop. Very brute, very rough around the edges, high-energy, heavy impact. But I love his honesty.
In more harsh words than I can cope, I felt like I was torn apart and put back together again. I'm not too sure if it was the way I was marketing / pitching myself and my business when I was explaining to him what I was doing, or if there was something else but it felt like I was doing something wrong with my business. Until his email came that says I was on the right track, haha.
Although I had a hard time digesting what he was saying, and needed a very long time to decompress what he has said to me (I did take it a little hard), there are golden nuggets in the conversation.
it's simply looking at it with new perspecitve, fresher mind and a challenge to overcome.
I would recommend utilising Greg's Free Hour to have a conversation with him - but come with a bullet proof vest, boxing gloves shin pads and boots (if you're a softy like me)

Reply from Greg Mccallum - ThinkWork
Knows stuff you haven't thought about.
A single hour-long conversation with Greg made us think about so many things we hadn't considered before. As a first-time founder, it's really comforting to know there's someone like Greg you can pick up the phone too!
Would highly recommend!

Reply from Greg Mccallum - ThinkWork
A very valuable session with Greg
A very valuable session with Greg. He was properly attentive and took time to understand what we were doing and what we needed help with. His advice was really useful for us to move forward with. I'm grateful for the generosity that he shared his insights with.

Reply from Greg Mccallum - ThinkWork
I hope to work with Greg again soon
Great energy and insights into a technical business with many challenges. We appreciated Greg's insights and sage advice. Will work with him again soon.

Reply from Greg Mccallum - ThinkWork
If you haven’t already, book your call with Greg!
Greg is such a generous person. His insight is completely gold standard, I feel so lucky to have spent a power hour with him. It was extremely valuable and I cannot thank him enough for his time. Anyone who hasn’t, book a call with Greg, I am sure his wisdom is valuable to any founder. I look forward to keeping in touch Greg!

Reply from Greg Mccallum - ThinkWork
A true POWER hour
The Power Hour with Greg literally was a POWER hour.
His advices were on point and very insightful.
An enjoyable moment of networking I recommend to any founders.
Thx a lot for this ! 🙏

Reply from Greg Mccallum - ThinkWork
Thanks Greg!
Thanks for the conversations Greg! I really appreciated your time, honesty, and insight. You had some great ideas. Thanks again!

Reply from Greg Mccallum - ThinkWork
Conversation with Greg
Greg is an honest, down to earth man.
Had an open conversation with him and felt confortable speaking with him. I gained some insights, and free value from it.

Reply from Greg Mccallum - ThinkWork
Exceptional expertise
Greg has exceptional expertise in helping guide beginning founders. He provided really eye opening and and effective solutions, highly recommend him.

Reply from Greg Mccallum - ThinkWork
Great commercial advisor
Greg is a great commercial advisor, with a lot of experience in the field. He's also very good at coming up with ideas/strategies and figuring out which ones will work or not.

Reply from Greg Mccallum - ThinkWork
Experienced
Experienced, useful, actionable advice and sales support!
He doesn't mind getting his hands dirty with the nitty gritty, which is so helpful.

Reply from Greg Mccallum - ThinkWork
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