GLG Competitors (2026): Top Expert Networks to Join Instead of (or Alongside) GLG

GLG (Gerson Lehrman Group) is the largest and best-known expert network company in the world, but it is far from the only one. If you are an expert deciding where to sign up, or a client comparing providers, the list of GLG competitors is long and growing. This guide breaks down the top expert networks that compete with GLG in 2026, how they differ, and which ones are worth your time. Want to start with the biggest network? Sign up for GLG here and add competitors alongside it. Why look at GLG competitors in the first place? GLG built the modern expert network model: connect professionals who have first-hand knowledge with investors, consultants, and corporations who will pay for a one-hour phone call. It works, and GLG has the scale to prove it. But scale has trade-offs. Experts often report that GLG's rates can be lower than boutique networks, that compliance is strict, and that call volume is inconsistent depending on your industry. That is exactly why comparing GLG competitors matters. Signing up with several expert network companies at once is the single most effective way to increase your call volume and your income. Most experts we talk to are registered with five to ten ne…