Best TAM and market-sizing tools for a defensible B2B universe
Compare TAM and market-sizing tools by bottom-up counts, company coverage, filters, exportability, assumptions, APIs, public pricing, and auditability.
Reviewed and updated August 20, 2026 by Argorant
Can the tool turn a written ICP into a named, deduplicated account universe whose assumptions and exclusions a sales or finance leader can audit?
Use Argorant or Apollo for bottom-up sales-contact counts, People Data Labs or Coresignal for API-calculated company universes, Crunchbase or Dealroom for private-market segments, and Sales Navigator for directional LinkedIn account and role estimates.
Name the thing you need back, and the shortlist gets short.
Coverage, verification and price only become comparable once the output is fixed. A file, a field and an endpoint are three different purchases.
How the shortlist was judged.
A global headline does not prove strong coverage in the buyer's countries, company sizes, or titles.
Practical test: Compare live counts and usable-field rates for the same ICP in each priority country.
Nominal records are irrelevant if the target field is missing, stale, or undeliverable.
Practical test: Run the same 100-record sample and separate deliverable, catch-all, unknown, invalid, and no-result outcomes.
API, MCP, and CLI rights determine whether a workflow can run reliably without rep clicks.
Practical test: Confirm plan eligibility, rate limits, authentication, credit behavior, and export permissions in writing.
Seats, credits, lookups, actions, and exports measure different things.
Practical test: Price the exact steps required to produce 1,000 campaign-ready records, including verification and add-ons.
Suppression, permissions, audit logs, overwrite rules, and spending limits prevent operational damage.
Practical test: Test opt-out handling, role permissions, credit caps, data overwrite behavior, and auditability before launch.
The shortlist.
Starter is $99 monthly or $74 per month billed annually for 4,500 contacts. The agent wallet is $0.035 per credit with no subscription.
The count reflects database coverage and filters, not the entire economic market.
Advanced is $159.99 per license monthly or $149.99 per month billed annually, equal to $1,799.88 per year. Advanced Plus is custom-priced.
Search estimates are not a census and cannot be treated as fully exportable market data.
Basic is $65 monthly or $49 per seat per month billed annually. Professional is $99 monthly or $79 annually. Organization is $119 per seat per month billed annually with a three-seat minimum.
Counts inherit Apollo's coverage and filter definitions and are not an independent market benchmark.
Pro is displayed at $49 per user per month billed annually. An official help page also documents a flexible $99 monthly option. Business and API prices are not public.
Its private-market lens underrepresents ordinary businesses outside that ecosystem.
Premium is €12,600 per year, equal to €1,050 per month, and starts at three seats. The USD page shows $14,500 per year. Higher API and enterprise packages are custom.
It is not an all-company business census.
Person Pro starts at $98 monthly or $78.40 per month on an annual commitment. Company Pro starts at $100 monthly or $80 annually. Enterprise is custom.
Profile coverage, duplicates, and field definitions must be audited in the calculation.
Mini is $49 monthly. Starter is $199 monthly or $2,149 annually, equal to $179.08 per month. Higher self-serve tiers run to $5,000 monthly.
Record types and endpoint credit weights make a reproducible query plan essential.
Side by side.
Published database sizes, accuracy claims and prices use different units, so every vendor statement below stays attributed. The buying test should still be your own sample and your own required fields.
| Provider | Best for | Coverage | Data type | Verification | Integrations | Agent access | Pricing shape | Decisive limitation |
|---|---|---|---|---|---|---|---|---|
| Argorant | Bottom-up company and decision-maker counts that can become verified lists. | 565.8M B2B contacts across 184 countries, with country, industry, company-size, seniority, department, and title filters. | Company and person records, verified work emails, company phones, and optional direct or mobile numbers. | Live SMTP verification runs at export. Invalid, unverifiable, and no-email outcomes are not charged as contact credits. | CSV exports, REST API, signed webhooks, CRM and sequencer handoffs. | MCP and API on paid plans; UI, API, CLI, and MCP through the no-subscription agent wallet. | Starter is $99 monthly or $74 per month billed annually for 4,500 contacts. The agent wallet is $0.035 per credit with no subscription. | The count reflects database coverage and filters, not the entire economic market. |
| LinkedIn Sales Navigator | Directional role and account sizing within the LinkedIn network. | LinkedIn member and company graph with relationship signals, alerts, account insights, and InMail. | Member profiles, employment context, account pages, relationship paths, buyer intent, and saved searches. | Not an email-verification product and not a bulk contact-export database. | CRM integrations and embedded profiles are concentrated in Advanced Plus. | No general contact-data API or hosted MCP replacement is offered through the standard plans. | Advanced is $159.99 per license monthly or $149.99 per month billed annually, equal to $1,799.88 per year. Advanced Plus is custom-priced. | Search estimates are not a census and cannot be treated as fully exportable market data. |
| Apollo | Sales teams sizing segments inside the same database used for activation. | Large global company and contact database combined with sequencing, enrichment, and rep workflows. | Company records, work emails, phones, intent and engagement fields, enrichment, and outbound workflow data. | Apollo says email credits are charged only when it can verify an email, while other data and workflow actions follow their own credit rules. | CRM integrations, browser extension, CSV, workflows, and public API. | Public API and MCP access use the signed-in workspace's normal permissions and credits. | Basic is $65 monthly or $49 per seat per month billed annually. Professional is $99 monthly or $79 annually. Organization is $119 per seat per month billed annually with a three-seat minimum. | Counts inherit Apollo's coverage and filter definitions and are not an independent market benchmark. |
| Crunchbase | Startup, funding, acquisition, and private-company market sizing. | Private-company, funding, acquisition, investor, and growth intelligence with contact features on paid plans. | Company profiles, private-market events, funding data, predictions, contacts, and saved searches. | The product emphasizes company intelligence. Contact verification should be tested separately from private-market coverage. | CSV and CRM workflow on Pro or Business; production API is a separate enterprise purchase. | No public hosted MCP server was confirmed. API access is separate from the self-serve Pro subscription. | Pro is displayed at $49 per user per month billed annually. An official help page also documents a flexible $99 monthly option. Business and API prices are not public. | Its private-market lens underrepresents ordinary businesses outside that ecosystem. |
| Dealroom | Venture, innovation ecosystem, investor, and startup TAM analysis. | Startup, scaleup, investor, funding, ecosystem, and private-market data across global innovation markets. | Companies, funds, investors, founders, funding rounds, valuations, taxonomies, and market maps. | Designed for private-market research rather than verified outbound email delivery. | REST API, exports, hosted data products, dashboards, and analyst support on higher packages. | A hosted read-only MCP server is included on Premium Plus, Enterprise, and API plans. | Premium is €12,600 per year, equal to €1,050 per month, and starts at three seats. The USD page shows $14,500 per year. Higher API and enterprise packages are custom. | It is not an all-company business census. |
| People Data Labs | Programmatic bottom-up company or person counts using search APIs. | Global person, company, IP, job, and identity data delivered primarily through APIs and bulk products. | Person and company profiles, enrichment, search, identity resolution, and bulk datasets. | A credit is charged for a successful API profile or match. That success signal is not the same as work-email deliverability. | REST and bulk APIs, flat files, and enterprise data licenses. | API-first access is public. No hosted MCP server was confirmed. | Person Pro starts at $98 monthly or $78.40 per month on an annual commitment. Company Pro starts at $100 monthly or $80 annually. Enterprise is custom. | Profile coverage, duplicates, and field definitions must be audited in the calculation. |
| Coresignal | API-based company, employee, jobs, and headcount sizing with agentic search. | Multi-source professional, company, job, and employee data collected from more than 15 public web sources. | Company, employee, job, post, and historical headcount APIs. | Billing is tied to successful API responses, not email deliverability. Contact enrichment is a separate endpoint. | REST APIs, Elasticsearch-style search, webhooks, bulk data, and data feeds. | Agentic Search API is listed across plans. No hosted MCP server was confirmed on the public pricing documentation. | Mini is $49 monthly. Starter is $199 monthly or $2,149 annually, equal to $179.08 per month. Higher self-serve tiers run to $5,000 monthly. | Record types and endpoint credit weights make a reproducible query plan essential. |
Worked scenario: Sizing before contact purchase
- Argorant searches, counts, filters, and previews are free on an active plan.
- Contact reveal or export is a later paid step.
- Other products can include counts inside their paid subscriptions.
Separate sizing from activation. A team should be able to refine assumptions before it spends contact credits on the final account universe.
A defensible TAM is not one large number. It is a low, base, and high range tied to explicit filters, overlap rules, data coverage, named accounts, and the number of reachable buying roles inside those accounts.
Source evidenceDealroom pricing page showing Premium, Premium Plus, Enterprise, and API plus MCP packages, annual prices, export credits, and agent access.Show captureHide capture
7 sources checked and datedShow sources
Frequently asked
No. It is a bottom-up observation from one dataset. TAM also depends on spend, adoption, exclusions, coverage, and the buyer's definition of the market.
Start with unique companies for market size, then calculate reachable buying roles as a separate activation layer. Do not add people and companies together.
Use stable company identifiers or normalized domains, document subsidiaries and parent rules, and deduplicate before summing countries or segments.
Test the exact market
before you commit.
Count and preview the segment, then compare the cost of usable verified output on the same sample.
