Expert Network Comparison 2026: GLG vs AlphaSights vs Third Bridge vs Guidepoint vs Done-For-You Research

Why This Guide Exists

If you're evaluating expert networks right now, you've probably noticed that nearly every comparison online is written by an expert network or by an affiliate site that monetises referrals. Reddit threads are full of investment professionals asking peers which platforms to use, because they don't trust vendor content.

This guide is different. We've spent years running primary research programs for PE deal teams, hedge fund analysts, and corporate strategy groups — and we've worked with (and around) every major expert network in the process. What follows is an honest, practitioner-grade comparison of the four dominant providers, their histories, what they do well, where they fall short, and when a fundamentally different model — done-for-you research — is the better answer.

The Expert Network Industry: A Brief History

Through one-to-one consultations, targeted surveys, roundtables, and advisory engagements, expert networks serve as an intermediary layer between market participants and specialised subject-matter expertise. Over the past two decades, the sector has evolved from a niche research facilitation model into a core component of institutional due diligence workflows. What began as relationship-driven knowledge brokering has matured into globally distributed operational platforms with formal compliance infrastructures, structured vetting processes, and increasingly digitised coordination systems.

According to a 2011 TABB Group report, 81% of investment professionals said expert calls are a legitimate and value-adding part of investment due diligence. Over time, the market expanded rapidly, and by 2019, more than 130 information services providers were operating globally.

Today, the "Big Five" expert networks leading the industry are AlphaSense-Tegus (following their merger), Gerson Lehrman Group (GLG), Third Bridge, AlphaSights, and Guidepoint. Below, we examine the four self-serve expert networks that investment teams interact with most frequently, and then introduce a structurally different category: done-for-you research.

1. GLG (Gerson Lehrman Group)

Background & History

Gerson Lehrman Group (GLG) is the world's largest and most established expert network. Founded in 1998 in New York City, GLG has evolved from a niche publishing firm to a global leader in first-hand expertise and insights.

GLG, initially funded by friends and family, was formed as a publishing house to produce industry guidebooks for institutional investors. However, the founders discovered that their clients wanted to talk directly to experts in casual conversations, rather than reading formal written reports. Accordingly, in 1999, GLG abandoned its publishing business and began offering subscriptions to its network of experts.

GLG's first customers were investors, and most of their growth from 1999 to 2005 was within the investment community. In 2006, they began working with big strategy consultancies and with companies in life sciences, chemicals and industrials, and technology. By 2010, The Wall Street Journal had described GLG as "dominating the U.S. expert networking industry."

Key corporate milestones include a $30 million investment from Bessemer Venture Partners in 2004, a $200 million investment from Silver Lake in 2008, valuing the company at $875 million, and a filed IPO in late 2021 that was pulled back in March 2022. In July 2023, GLG named Gemma Postlewaithe as its new CEO, replacing Paul Todd who had led the company for five years.

Key Stats

• Expert network size: More than 1.2 million vetted professionals spanning industries, geographies, and seniority levels
• Global footprint: Headquartered in New York City, with offices in 22 cities in 12 countries
• Employees: 2,300+ employees as of October 2022
• Revenue: In 2019, GLG generated close to $550 million in revenues and remains the largest expert network in the industry by revenue
• Indicative pricing: Premium pricing at approximately $1,350 per hour

Coverage & Services

The firm supports multi-sector research needs across technology, healthcare, industrials, consumer, energy, and financial services.

Core offerings include:

• GLG Calls — one-on-one, translated, or multiparty conversations with experts
• GLG Surveys — full-spectrum B2B insights from first-hand expertise
• GLG Events — roundtables, webcasts, and teleconferences with leading experts
• GLG Library — a subscription providing access to event transcripts, replays, and research content
• GLG Strategic Projects — the company's consulting arm, led by a former McKinsey consultant and promoted as a full consulting service

Pros

• Large expert pool — over 900,000+ professionals (with some estimates exceeding 1.2M)
• Strong compliance framework
• Structured research formats — one-on-one calls, surveys, and expert panels
• Long operating history, global footprint, and embedded compliance infrastructure
• Over 25 years of operating experience, with continued innovation including a redesigned client portal (myGLG)

Cons

• Higher cost — subscription-based pricing
• Less flexibility in custom expert matching
• While GLG remains a large vendor and holds a significant market share, its recent growth has been slower, and it has been losing market share to new entrants
• Some of GLG's significant consulting clients have expressed concern about GLG effectively competing with them through its strategic projects arm, while also handling their sensitive consulting project data

Best For

GLG is the largest and most established expert network. It is appropriate for teams that prioritise breadth of expert availability, established compliance infrastructure, and global scale across mature and emerging markets.

2. AlphaSights

Background & History

AlphaSights is a global expert network that provides knowledge on demand by connecting companies seeking information with subject matter experts who have first-hand industry experience. The platform serves as a 'knowledge broker', allowing clients to consult one-on-one with a carefully selected network of experts. Founded in 2008 in London, AlphaSights has experienced rapid growth since its inception.

The company was founded in 2008 and incorporated in 2009 in London by Max Cartellieri and Andrew Heath. They met at Stanford Business School in California.

AlphaSights is one of the larger expert networks. It was founded in 2008 and became one of the first firms to successfully reduce GLG's market dominance, growing in tandem with Third Bridge.

A distinctive part of AlphaSights' model is that the 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'.

Key Stats

• Employees: A team of 2,000+ professionals providing round-the-clock coverage from San Francisco to Shanghai
• Global footprint: Headquartered in London with offices in New York, Hamburg, Dubai, Hong Kong, San Francisco, Shanghai, Seoul, and Tokyo
• Growth: In 2025, AlphaSights updated its website stating it had more than 2,000 employees, up from 1,500 employees in June 2024
• Languages: Team members speak 60+ languages

Coverage & Services

The company's clients include professionals operating in management & strategy consulting, investment management, private equity, corporate and professional services firms, with interests in technology, industrials, consumer goods, telecommunications, utilities, financial services, healthcare, consumer services, basic materials, and oil and gas.

Core offerings include:

• AlphaSights calls — 30-60 minute telephone conversations (occasionally over video). Calls are the most common way they work with experts.
• Surveys, insights projects, and a content library named AlphaNow
• AlphaGPT — a tool that leverages GenAI for natural-language answers from expert data
• AlphaGraph — a machine-learning-powered tool mapping millions of expert-company relationships for precise matching

Pros

• Recognised for speed and scale, connecting clients to experts within hours. With offices across major financial hubs, AlphaSights combines human sourcing teams with proprietary technology to identify and match the most relevant experts quickly, ensuring high match accuracy for time-sensitive projects.
• Strong compliance programme with compliance monitoring to check expert calls — if a call goes into sensitive areas, the system flags it for review
• Project-based custom sourcing means you're not limited to a static database
• Rapidly developing AI tools (AlphaGPT, AlphaGraph, AlphaNow)

Cons

• Expensive compared to competitors, with limited transparency on pricing
• Primarily geared towards qualitative insights, which may not meet the needs of teams requiring detailed quantitative analysis. The platform also lacks certain critical qualitative content sets such as broker research, company documents, and news.
• No static expert database means repeat access to a specific expert may require re-sourcing

Best For

Investment teams and consulting firms that need speed above all else, are comfortable running their own calls, and value custom-sourced experts over a browsable database. AlphaSights is particularly strong for time-sensitive projects where you need precisely matched experts within hours.

3. Third Bridge

Background & History

Third Bridge is one of the largest expert networks globally. Founded in 2007 as Cognolink, it rebranded in 2015 as Third Bridge. It was one of the first firms to successfully reduce GLG's market dominance, growing in tandem with AlphaSights. Its founders had a background in consulting with Bain & Company.

During its relatively brief existence, Third Bridge has rapidly transformed itself into a global entity with a team of 1,000+ employees in eight offices spanning three continents. 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.

In 2021, French private equity firm Astorg invested over $200 million in Third Bridge, acquiring a stake alongside its founders. In 2022, it opened a third U.S. office in Dallas, Texas.

Key Stats

• Employees: 1,000+ across 8 offices globally
• Global footprint: Offices in London, New York, Los Angeles, Shanghai, Beijing, Hong Kong, Mumbai, and Dallas
• Content: Conducts over 10,000 interviews each year, covering 4,000 global private and public companies. Clients can access 15,000+ previous interview transcripts.
• Pricing: Models range from pay-per-call to annual subscriptions. Rates typically range from $300 to $1,200 per hour.

Coverage & Services

Third Bridge is a global investment research provider serving private equity, credit investors, hedge funds, and corporates. It combines expert calls with a scalable research ecosystem that includes a large library of analyst-led interviews and thematic content.

Third Bridge offers two major product pillars:

• Expert Connections — direct access to prequalified industry experts through one-on-one consultations, surveys, and project recruiting. Approximately 50% of employees work in this division.
• Library (formerly Forum) — a three-part product including company databases, a transcript library (including hosted expert calls), and AI-powered search across all content
• A proprietary coverage model that ranks, filters, and prioritises companies, plus Maps that visually present public and private company value chains
• Primers providing information on privately held companies and Tearsheets condensing company information into a summary view

Pros

• Teams use Third Bridge when they need to get smart fast — either by reading existing transcripts before spending a call, or by sourcing highly specific experts on short notice. The transcript Library enables early-stage understanding without placing a call.
• Third Bridge's analyst-led interview model strengthens call quality by ensuring conversations are guided by professionals who understand how private equity evaluates opportunities and risks.
• All experts are custom-sourced rather than self-referred or pulled from a static pool, which reduces the risk of irrelevant or stale perspectives
• Strong PE focus and deep sector content, particularly in healthcare
• Active AI distribution partnerships — content now accessible through Portrait Analytics, Hebbia, Model ML, Anthropic, Finster AI, Samaya AI, and Rogo

Cons

• Less suited for one-off calls without context — the platform is optimised for deeper, ongoing research workflows
• Transcript library, while valuable, can create a risk of confirmation bias if teams rely on older interviews without conducting fresh calls
• Pricing can be opaque depending on the product mix (Library subscription vs. Connections calls)

Best For

Suitable for time-pressured asset managers, PE firms, strategy teams, and corporates that need 24/7 access to expert-level insight to validate or challenge theses across idea generation, diligence, and post-deal monitoring. Third Bridge is particularly strong for teams that value pre-existing content alongside live expert access.

4. Guidepoint

Background & History

Founded in 2003, Guidepoint has grown to become one of the leading expert networks in the industry. Originally launched as Clinical Advisors, the company rebranded as Guidepoint Global in 2007 to better reflect its expanding range of services beyond the healthcare industry. In 2015, it simplified its name to Guidepoint.

Launched in 2003, Clinical Advisors matched cancer patients with clinical trials 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.

In 2009, Guidepoint acquired Vista Research, an expert network company that was active in Asia and had a strong network of experts in technology and telecom. In 2015, it acquired Innosquared, a German expert network with a strong presence in Europe, and transformed this into a consulting-only office in Düsseldorf.

Guidepoint has influenced the broader expert network industry, with several former employees founding their own networks — including ExpertConnect (2009), Bridger (2019), Pangea SI (2019), and Swissmen (2023).

Key Stats

• Expert network size: As of 2024, Guidepoint announced it had 4,500+ clients and 1.5 million+ experts
• Global footprint: Guidepoint operates in 18 offices worldwide
• Daily volume: Guidepoint facilitates over 1,000 interactions daily
• Coverage: Experts across more than 150 industries
• Employees: Over 1,000 employees spread across offices on four continents
• Pricing: Known for flexible engagement options and lower pricing relative to peers

Coverage & Services

Guidepoint is primarily used by finance, consulting, and corporate strategy professionals who require expert opinions and insights for primary research to research markets.

Core offerings include:

• Expert consultations — direct, confidential conversations between clients and prequalified experts, often scheduled within hours
• Scalable surveys and comprehensive questionnaires — gathering insights from up to 100 experts, typically delivered within 36 hours
• Guidepoint Insights — a product similar to Third Bridge's Forum, launched in 2018
• Guidepoint Legal Solutions for expert witnesses and Qsight, a quantitative data product for the healthcare sector

Pros

• Flexibility — known for providing custom solutions across expert calls, quantitative surveys, data products, and long-term engagements. Its client base includes leading hedge funds, corporates, and consulting firms.
• Quick access to relevant expertise, often within hours, with tailored research services
• Competitive pricing compared to GLG and AlphaSights
• Healthcare roots provide strength in life sciences diligence
• Strict compliance protocols protecting client confidentiality and preventing insider information leaks, monitoring every expert interaction

Cons

• While Guidepoint excels in providing direct access to industry experts, its focus on primary research through expert interactions can be limiting. The platform primarily offers qualitative insights, which might not be sufficient for users requiring a broader view of market trends.
• Relies heavily on human expertise and lacks some automation and AI features for accelerating market research compared to more tech-forward competitors
• Estimated to have a lower revenue per head than many large peers, given its low pricing — which may affect service depth on complex projects

Best For

Teams that want broad expert access with more pricing flexibility than GLG or AlphaSights provide. Guidepoint is particularly well-suited for consulting firms running large diligence programs with high call volumes, and for healthcare-focused research given its origins and Qsight data product.

5. Woozle Research: The Done-For-You Alternative

Background & Model

Woozle Research occupies a fundamentally different category from the four networks above. We are not an expert network. We don't sell access to experts or charge per call. Instead, we are a done-for-you primary research provider: investment teams brief us on what they need to know, and we go and do the primary research — expert interviews, B2B surveys, channel checks — and deliver finished, actionable research outputs.

Our clients use Woozle instead of (or alongside) the traditional expert networks listed above. The key difference: they don't have to do the work themselves. No scheduling calls, no writing discussion guides, no synthesising 15 transcripts into a conclusion.

What Woozle Handles End-to-End

• Research design: Translating your deal thesis or investment question into a structured research plan — who to talk to, what to ask, how many interviews you need, and what sequence
• Expert sourcing and recruitment: Finding and scheduling the right respondents, whether they're customers of a target, competitors, former executives, or channel partners
• Interview execution: Running the calls with trained moderators who know how to probe, follow up, and extract the signal from noise
• Synthesis and deliverables: Delivering polished output — typically a written report with key findings, supporting quotes, and a clear "so what" — not a stack of raw transcripts
• B2B surveys and channel checks: Quantitative validation of themes emerging from qualitative interviews, designed for triangulation

Who Woozle Is For

• PE deal teams running commercial due diligence who need primary research completed within a 2-3 week exclusivity window
• Hedge fund analysts who need differentiated primary research to build or challenge a thesis on a public company — without spending a week scheduling and running calls themselves
• Corporate strategy and M&A teams evaluating targets but lacking internal research infrastructure
• Management consultants supporting CDD workstreams for PE clients who need to supplement their desk research with real primary data

Pros

• Time savings: Your team briefs us and gets finished research back. No call scheduling, no transcript review, no synthesis
• Quality of output: We deliver conclusions, not raw materials. The deliverable is a research product, not a pile of transcripts
• Research design expertise: We scope the program — respondent types, interview guides, sample sizes — based on what the deal or thesis actually requires
• Triangulation built in: We combine expert interviews, customer calls, competitor perspectives, and surveys to stress-test findings, rather than relying on a single expert's view
• Flexible engagement: No annual subscriptions or per-seat licensing — you engage us when you have a deal or research need

Cons

• Less control over individual calls: If you want to personally conduct every interview and drive the conversation, a self-serve expert network gives you that
• Not suited for ad hoc single-expert calls: If you just need one quick 30-minute call on a narrow topic, a traditional expert network is more efficient
• Requires upfront briefing: You need to invest time defining the research question clearly — though this is also what makes the output better

Best For

Teams that need primary research to drive a decision — not just access to experts. If your bottleneck is time, synthesis, or research design (not just "finding someone to talk to"), done-for-you research is the category to evaluate.

Head-to-Head Comparison Summary

How to Decide: A Framework for Your Team

The right choice depends on your team's capacity, the nature of the research need, and where your bottleneck actually sits. Here's how to think about it:

Choose a traditional expert network (GLG, AlphaSights, Third Bridge, or Guidepoint) if:

• You have experienced analysts who are skilled at designing discussion guides, running calls, and synthesising findings
• You want direct control over every conversation — to probe specific angles in real time
• You need ad hoc, single-expert calls to quickly gut-check a narrow question
• You have a standing research budget and want always-on access to experts across sectors
• You value a large transcript library for passive research between active projects

Choose done-for-you research (Woozle) if:

• Your bottleneck is time or headcount — not access to experts
• You need a complete research program scoped and executed against a deal timeline (e.g. 2-3 weeks in exclusivity)
• You want synthesised findings delivered as conclusions, not raw transcripts
• You need multiple research methods (interviews + surveys + channel checks) coordinated into one output
• Your team is stretched across multiple deals and can't staff another 15-call research program internally

Use both if:

• You use expert networks for ad hoc calls and ongoing monitoring, but need a dedicated research team for intensive deal-level diligence
• You want to supplement your own expert calls with a structured, outsourced research program that provides a second data point

The Bottom Line

The expert network market in 2026 is more competitive than ever, with each of the four major platforms investing heavily in AI tools, transcript libraries, and compliance infrastructure. But despite all this innovation, the fundamental model hasn't changed: these platforms connect you with experts, and you do the research yourself.

For many teams, that's exactly what they want. For others — particularly PE deal teams running diligence under tight timelines, or hedge fund analysts who need differentiated insights without spending a week on calls — the question isn't "which expert network should I use?" It's "should I be doing this work at all, or should I brief a team that does this every day?"

That's the question Woozle was built to answer. If you're evaluating your primary research approach for the next deal or thesis, get in touch — we'll show you what a done-for-you research program looks like in practice.