GLG vs. AlphaSights vs. Third Bridge vs. Guidepoint — An Honest Comparison for Research Buyers

Every comparison piece you'll find on GLG, AlphaSights, Third Bridge, and Guidepoint is written by a vendor trying to sell you something — usually themselves. The smaller players write "unbiased comparisons" that conveniently conclude their platform is the best fit. The big four write case studies that make everything sound flawless.

None of it is written from the seat where you sit: running a deal process, trying to get six expert calls scheduled by Friday, wondering whether the $12,000 you just spent on four conversations actually moved your conviction level.

This guide is different. We've used all four of these networks extensively across hundreds of engagements — PE due diligence, public equity deep-dives, competitive landscaping projects, the full range. Below is what we've learned, supported by the hard numbers each provider publishes (and a few they'd rather you didn't see).

The Big Four at a Glance

GLG — The Incumbent Giant

The Facts

GLG is the world's largest expert network, with over 1,000,000 freelance consultants. Their own site puts the current figure higher: GLG works with approximately 1.2 million professionals across industry, role, and geography. The firm was founded in 1998 and has been backed by private equity firms Silver Lake Partners, Bessemer Venture Partners, and SFW Capital Partners.

On revenue, in 2019, GLG generated close to $550M in revenues and remains the largest expert network in the industry by revenue. The expert network industry has continued to grow since its start in 1998 and grew to $1.3 billion in revenue by the end of 2023 — and GLG still commands the largest slice.

GLG is headquartered in New York City, with offices in 22 cities in 12 countries. GLG's clients include strategy consulting corporations, hedge funds, private equity firms, professional service firms, and non-profit organizations.

Pricing

GLG is the most expensive option on this list. There are indices (2025 data) that GLG usually charges its clients between US$1,500 and US$2,000 per hour. For example, an expert's consulting rate might be $300 per hour, but GLG often charges its clients $1,000+ per hour for facilitating the call. That markup can reach up to 70% contribution margins according to industry observers. For a deal team running 10–15 calls per project, you're looking at $15,000–$30,000 before you've synthesised a single finding.

Clients can opt for various subscription plans that offer differing levels of access to GLG's expert network, including the volume and frequency of consultations. Additionally, specific project engagements, such as detailed research reports or comprehensive surveys, are billed on a per-project basis.

Expert Matching & Delivery Speed

Fast expert matching — typically within 24 hours. In practice, this is accurate for mainstream sectors (tech, healthcare, consumer). For niche industrial verticals or emerging markets, it often takes 2–3 days to get a well-matched profile. Their matching model relies on the sheer size of their database — they're pulling from a pre-recruited pool rather than doing custom outreach for most requests.

What GLG Does Well

• Scale and breadth. The caliber of specialists provided through GLG is widely considered to be of high quality. Although large, GLG's network is thoroughly verified and classified.
• Compliance. Their unparalleled compliance systems and technologies provide a structured, auditable, and transparent way for clients to receive actionable insights. GLG's proprietary compliance systems and technology are major competitive differentiators and a core component of their culture.
• Breadth of services. Current GLG service offerings also include expert surveys, GLG Events (conferences, roundtables and workshops), GLG Library (a database of teleconference transcripts), GLG Projects (providing experts for longer-term assignments such as due diligence studies) and GLG Placements (providing c-suite professionals for longer time periods).

Where GLG Falls Short

• Price. If you're a mid-market PE shop running lean, GLG's all-in cost per insight is hard to justify when you factor in analyst time on top of the call fees.
• Flexibility. Higher cost — subscription-based pricing. Less flexibility in custom expert matching.
• Growth trajectory. GLG's recent growth has been slower, and it has been losing market share to new entrants. Many firms have moved away from only using GLG, to also using e.g. AlphaSights, Dialectica, Third Bridge, or multi-network access through Inex One.

AlphaSights — The Service-Obsessed Challenger

The Facts

AlphaSights is an information services company, specializing in connecting clients with experts, sometimes referred to as an expert network. The company was founded in 2008 and incorporated in 2009 in London by Max Cartellieri and Andrew Heath.

Unlike GLG, AlphaSights doesn't primarily rely on a static database of pre-registered experts. The AlphaSights team works on a project-by-project basis, conducting fresh recruitment to precisely-match experts to evolving client needs. AlphaSights does not operate as a sign-up 'network.' Their technology layer connects the dots: Applying machine learning to over 25 million expert-to-company relationships curated by our global team, the AlphaGraph instantly surfaces experts precisely matched to your needs.

In 2025, AlphaSights updated its website, stating it had more than 2,000 employees, up from 1,500 employees in June 2024. AlphaSights is headquartered in London and has offices in New York, Hamburg, Dubai, Hong Kong, San Francisco, Shanghai, Seoul, and Tokyo.

The growth story is extraordinary. The firm's growth has been remarkable, achieving a compound annual growth rate (CAGR) of 70% in revenue from 2009 to 2023. Recent estimates place its annual revenue between $629 million and $750 million as of late 2025. In September 2024, AlphaSights raised $400 million in growth funding at a $4.2 billion valuation, led by Carlyle and TA Associates.

Pricing

Clients are willing to pay AlphaSights $1,000 per hour or more to speak with their experts. While the hourly cost seems high, it's a trivial amount to spend on insights that could shape multi-million dollar decisions. In practice, we find AlphaSights slightly below GLG's sticker price but above Guidepoint — a premium-but-not-quite-top-shelf positioning that works for most deal budgets.

Expert Matching & Delivery Speed

This is where AlphaSights genuinely differentiates. Since 2008, their disruptive custom search model has raised the bar for expert quality. Whatever the brief, they're relentless in sourcing custom experts — qualifying each and every profile to ensure a precise match against your requirements. The custom-recruitment model means that when you submit a project, their associates go and find experts specifically for your question — not just filter a database.

In our experience, AlphaSights typically delivers 3–5 qualified profiles within 24–48 hours on most sectors, and their associates are aggressive about scheduling. Their team structure helps: Associates manage both research (expert recruitment), client account management, and sales for their accounts. This differs from GLG and Third Bridge, who have separated the research role and customer-facing sales roles. As a result, AlphaSights has kept a higher productivity/yield per employee than most peers.

What AlphaSights Does Well

• Custom match quality. Because they recruit fresh for each project, the relevance of experts tends to be higher for niche briefs. Clients enjoy the responsive communication, well-organized schedule, and helpful guidance offered by AlphaSights associates. Reviewers emphasized the "rigorous approach to validating expertise."
• Client service intensity. Today, their team of 2,000+ professionals provide round-the-clock coverage from San Francisco to Shanghai. Hailing from the world's top universities, and speaking 60+ languages, many of their clients view AlphaSights professionals as 'an extension of the team.'
• Technology platform. Key features include AlphaNow™, a searchable library of expert research updated weekly; AlphaGPT, a GenAI tool for natural-language answers from expert data; AI Project Summary; and AlphaGraph, a machine-learning-powered tool mapping millions of expert-company relationships.

Where AlphaSights Falls Short

• Associate experience. Their associates are smart and driven, but they're typically recent graduates. On highly technical sectors (specialty chemicals, complex industrials), you may find yourself educating the associate before they can effectively recruit.
• Expert relations. AlphaSights more frequently receives complaints about ghosting experts (abruptly cutting off all communication) after confirming a good fit and promising follow-up steps. This matters because expert satisfaction directly affects who's willing to take your call.
• Transcript library still maturing. While AlphaNow exists, it's newer and thinner than GLG Library or Third Bridge's Forum. If you need archival content to prep for a call, you may find less material here.

Third Bridge — The Content-First Hybrid

The Facts

Founded in 2007 as Cognolink, it rebranded in 2016 as Third Bridge. Its dedication to impeccable client service has enabled Third Bridge to grow from a visionary idea into a global research organization with over 1,500 employees across 12 offices on four continents. They offer access to over 1.5 million individually recruited and rigorously vetted experts.

Headquartered in London, Third Bridge maintains offices in New York, Los Angeles, Shanghai, Beijing, Hong Kong, and Mumbai, catering to the information needs of over 1,000 investment firm clients.

On funding, French private equity firm Astorg bought IK Investment Partners' stake, and invested in Third Bridge alongside its founders. The investment was later said to be of more than $200M.

The Differentiator: Library (Formerly Forum)

Third Bridge is unique among the big four because it runs a significant content business alongside its expert call operation. According to their site, they conduct over 10,000 interviews each year, covering 4,000 global private and public companies. Meanwhile, clients can access 15,000+ previous interview transcripts. More recently, they've built the Third Bridge MCP so you can access 100,000+ expert transcripts directly in ChatGPT.

Expert calls are the core service, with approximately half of the firm's staff working in the research team. Library, a three-part product, includes company databases, a transcript library, and the ability to AI search all this content. This represents approximately 25% of revenues and the majority of net profit.

Pricing

Third Bridge's pricing is the least transparent of the four. Third Bridge obscures its true pricing by charging for "credits." While the price per credit may be lower, Third Bridge routinely charges multiple credits per expert call. This makes the true price higher. Clients pay per-seat subscriptions to access Third Bridge's growing database of call transcripts. So you're often paying twice: a subscription for transcript access plus credits for live calls.

What Third Bridge Does Well

• Pre-call intelligence. The transcript library is genuinely useful for getting smart on a sector or company before you brief a call. If you're running public equity research and need to review what former employees of a target have said in the last 12 months, this is the most efficient source.
• Content integration. Third Bridge publishes its content on several "distribution partners," starting with Bloomberg. From 2025, they expanded distribution to multiple other 3rd-party platforms.
• Compliance. They vet and cross reference every expert before every call for every project. Their industry-leading compliance and risk management technology ensures every interaction is trustworthy, confidential, and secure.

Where Third Bridge Falls Short

• Pricing opacity. The credit system makes it nearly impossible to compare costs on an apples-to-apples basis without running a pilot. Several buy-side professionals we've worked with didn't realise the true per-call cost until months in.
• Call business is secondary. If your primary need is scheduling six live calls this week with specific individuals, Third Bridge's workflow can feel slower than AlphaSights or GLG. The firm allocates significant resources to its content operation, and that focus shows.
• Senior leadership churn. At the end of 2022, Third Bridge lost three senior leaders: the President, the CFO, and the Chief People Officer. While the firm has stabilised since, that kind of turnover at the top matters to long-term clients.

Guidepoint — The Value Play

The Facts

Guidepoint was founded by Albert Sebag as Clinical Advisors. Launched in 2003, Clinical Advisors matched cancer patients with the clinical trial that best suited their case. As Clinical Advisors expanded their network to include expertise in additional healthcare areas, the company progressed into other industries and sectors.

Today, Guidepoint connects leading organizations with expertise globally through their expert network of 1.75M+ advisors. However, context matters: this would be the largest expert database in the industry, which is a bit odd as Guidepoint is only the 3rd largest expert network. It would mean that Guidepoint does not remove outdated/irrelevant experts at the same rate as other expert networks do.

In June 2024, Guidepoint had 1,300+ employees across 17 offices, 1.5M+ experts, and 4,500+ clients worldwide. This was up from approximately 800 employees, 14 offices, and 650K+ experts in June 2020. That's impressive growth in headcount and client base over four years.

According to Integrity Research, Guidepoint is ranked as the second-largest expert network.

Pricing

Guidepoint is consistently the most affordable of the big four. It is known for flexible engagement options and lower pricing. Guidepoint has a lower revenue/head than many large peers, given its low pricing. If you're running a high-volume programme — 20+ calls per month — Guidepoint's cost advantage compounds quickly. They add 20,000+ experts to their network every month through custom recruiting.

Expert Matching & Delivery Speed

Research projects are time-sensitive and consultations are often completed within 72 hours of the initial request. From personal experience, Guidepoint is generally fast for broad topics where their large database already contains relevant profiles. For niche searches — say, a former VP of operations at a specific portfolio company — the turnaround can stretch to a week because they're relying on database matching more than fresh custom recruitment.

What Guidepoint Does Well

• Volume and value. If your research model involves large numbers of calls at acceptable (rather than exceptional) quality, Guidepoint delivers the best economics. They're particularly effective for channel checks where you need 15–20 conversations to triangulate a finding.
• Healthcare and life sciences depth. Guidepoint Legal Solutions team helps clients find expert witnesses for litigation needs. Unlike other large expert networks, Guidepoint also offers quantitative data products under the name of Qsight, providing various proprietary pricing and market data in the healthcare sector. This roots in their Clinical Advisors origin give them genuine depth here that the others lack.
• Client base breadth. With 4,500+ clients and 1.5 million+ experts, Guidepoint serves a wider range of buyers than the other three, including corporates, law firms, and smaller funds that can't afford GLG minimums.

Where Guidepoint Falls Short

• Database quality concerns. A raw count of 1.75M experts sounds impressive, but only a small portion of that number has worked on a project for the company. An inflated database means more noise when you're trying to find signal.
• Match precision on niche briefs. For specialised PE due diligence questions — "I need the former head of procurement at this specific mid-market industrial" — Guidepoint's database-first approach doesn't deliver the same precision as AlphaSights' custom recruitment.
• Operational stability. Two weeks before Christmas 2023, Guidepoint laid off the entire German team of approximately 60 people, and in 2022, Guidepoint agreed to pay a total of $4.4M in two separate lawsuits concerning overtime compensation to more than 500 former employees.

Head-to-Head: What Matters Most for Deal Teams

Best Match Quality for Niche Briefs: AlphaSights

When you have a very specific brief — "I need the former divisional CFO of Company X who left in the last 18 months" — AlphaSights' custom-recruitment model consistently outperforms database-first approaches. Their associates will cold-call and LinkedIn-message their way to the right person. It's brute force, but it works.

Best for Pre-Call Intelligence & Content: Third Bridge

If you want to read what eight former employees of your target company said before you schedule your own calls, Third Bridge's Library product is the most developed offering. With an expert network of over 1.5 million and a Library covering over 65,000 companies, they put the world's richest insights at your fingertips.

Best for High-Volume Programmes: Guidepoint

When you need 20+ calls across a competitive landscape and you're optimising for breadth of coverage on a constrained budget, Guidepoint's lower pricing and massive (if somewhat noisy) database wins. Their healthcare data products (Qsight) are a genuine differentiator for pharma and medtech-focused teams.

Best for Enterprise Compliance Needs: GLG

If you're at a large fund where the compliance team has veto power over research vendors, GLG's track record and compliance infrastructure are the safest bet. They've been doing this since 1998, and their documentation and audit trail are the most mature.

The Comparison Nobody Else Makes: Self-Serve vs. Done-For-You

Here's the thing every comparison guide leaves out: all four of these platforms are fundamentally self-serve. Yes, they source experts for you. But you still have to:

• Write the discussion guide
• Schedule and take every call
• Synthesise across 10–15 transcripts
• Extract the three findings that actually matter for your investment decision
• Package it into something your IC can act on

The real question isn't "which expert network should I use?" It's "should I be doing all of this work myself?"

For deal teams under time pressure — which is every deal team, always — the highest-ROI move isn't optimising which self-serve network you're using. It's asking whether you need a done-for-you research partner who handles the entire process end-to-end: expert sourcing, interview design, call execution, synthesis, and a finished deliverable you can present to your investment committee.

Expert networks give you access. A done-for-you partner gives you answers.

The Bottom Line

Most serious research buyers use two or three of these networks simultaneously, playing to each one's strengths. That's a legitimate strategy. But the question you should ask yourself first isn't which network to add — it's whether your team's time is best spent managing expert call logistics, or doing the actual analysis that drives investment decisions.