Exa vs TheirStack
An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.
The short answer
Editorial assessmentExa compared with TheirStack
TheirStack answers a narrow research question, which companies use which technologies and are hiring for what, from a maintained dataset with published pricing. Exa answers arbitrary research questions from the live web at a lower unit price but with more work required to shape the query and validate the output. Take TheirStack when your question is exactly the one it was built for; take Exa when it is not.
Choose Exa if
Technical teams and operators building list discovery or research into their own workflow, anyone whose prospecting question is a description rather than a filter, and buyers who want commodity pay-as-you-go pricing with no subscription and no expiring credits.
Choose TheirStack if
Vendors selling back-office, infrastructure, or developer software whose product never appears on a customer's website, recruiters and staffing firms who need hiring signal at scale, and technical GTM operators who would rather hit an API or an MCP server than click through a dashboard.
Side by side
13 attributes| Attribute | Exa | TheirStack |
|---|---|---|
| Category | Data | Signals |
| Starting price | $0 ($20 in free credits on signup plus $10 monthly), then $7 per 1,000 searches (free plan available) | Free tier on signup, then $49 per month for 1,500 credits or $109 once for 1,000 credits (free plan available) |
| Pricing model | Pure pay-as-you-go usage pricing with every operation individually published, no subscription, no minimum spend, no tiers, and no expiring credits. | Credit-based, sold either as a monthly subscription or as one-time packs with no subscription; unlimited team members and no per-seat charge. |
| Free plan | An additional $10 in credits every month on top of the signup grant, which makes genuinely light usage permanently free. | Free credits on signup with access to job search, company search, company lookup, enrichment, exports, and email alerts, at low volume. |
| Free trial | $20 in free credits on account creation, roughly 2,800 searches, with no card required to start | Not a time-limited trial; a free credit allowance is included on signup |
| Best for | Technical teams and operators building list discovery or research into their own workflow, anyone whose prospecting question is a description rather than a filter, and buyers who want commodity pay-as-you-go pricing with no subscription and no expiring credits. | Vendors selling back-office, infrastructure, or developer software whose product never appears on a customer's website, recruiters and staffing firms who need hiring signal at scale, and technical GTM operators who would rather hit an API or an MCP server than click through a dashboard. |
| Setup time | Twenty minutes to a first useful result: create an account, take the 20 dollars of free credit, and call search from Python or JavaScript. A production Websets pipeline with verification rules and custom enrichments is a few days of work rather than an afternoon. | Twenty minutes to a first list. Sign up, spend free credits on a query against your best-guess ICP, and read the source postings to see whether the extraction is catching what you expected. API integration is another afternoon. |
| Learning curve | Moderate to high by this category's standards, and the difficulty is conceptual rather than technical. Writing a good described query and a good verification rule is a skill, and a badly specified set returns plausible-looking results that quietly fail your criteria. Teams used to filter dropdowns will need to change how they think about list building. | Low for the app, moderate for the judgement. The filters are straightforward; the skill is learning which technology mentions actually indicate ownership rather than aspiration, and building filters that exclude recruitment agency postings. |
| Platforms | REST API, Python and JavaScript clients, Web dashboard, Webhooks | Web application, REST APIs for jobs, companies, technographics, and buying intents, MCP servers, CSV export |
| Compliance | Zero Data Retention available through enterprise arrangements | Job posting data is published business information rather than personal data, which keeps privacy exposure low, No publicly advertised SOC 2 attestation |
| Founded | 2021 | 2021 |
| Headquarters | San Francisco, California, United States | Barcelona, Spain |
| Ownership | Venture-backed, operating as Exa Labs Inc. | Privately held |
Strengths and limitations
Exa
Strengths
- The only product in this category that answers a described query rather than a filtered one, which makes previously unbuildable target lists buildable.
- Verification runs before enrichment in Websets, so contact spend lands only on results that already passed your criteria.
- Pure pay-as-you-go with no subscription, no minimum spend, no tiers, and nothing to expire, which is the cleanest commercial model in this batch.
- Every operation individually priced and published, from 1 dollar per thousand page fetches to 0.07 per phone number, so any workload can be modelled precisely before it is run.
Limitations
- Contact data is expensive per unit: 0.02 dollars an email is more than twice Tomba's rate, and 0.07 a phone is well above CUFinder's or SalesQL's effective rates.
- It is not a contact database, so there is no fixed people index to filter by title and seniority and no guarantee that a given person is findable at all.
- No match rate is published for either email or phone enrichment, and Exa does not state what happens when an enrichment itself returns nothing.
- Non-technical users will struggle; the dashboard exists but the product is designed to be called from code and the documentation is written for developers.
TheirStack
Strengths
- The job posting source sees software that no website crawler ever will, which makes TheirStack the only practical technographic option for back-office, data, and infrastructure vendors.
- Every extracted signal links back to the source posting, so claims are verifiable rather than a black box, and a rep can quote the actual requirement on a call.
- Ingestion of roughly 300,000 postings a day means the freshness ceiling is about a day, far better than the weekly or opportunistic crawls elsewhere in this category.
- The API is included in the same credit balance as the app rather than priced separately, and MCP servers are available, which is a genuinely developer-friendly posture at this price.
Limitations
- Everything is inference. A technology mentioned in a posting is strong evidence, not proof, and companies routinely list tools they are migrating away from, tools a single team uses, and tools copied from a stale template.
- Companies that do not advertise roles publicly are effectively absent, which skews coverage toward larger and faster-growing organisations and away from small established businesses.
- Recruitment agency postings are a persistent noise source: the hiring company in the record may be the agency rather than the end employer, and filtering that out takes deliberate work.
- No storefront or consumer-web technographics, so ecommerce app vendors get nothing useful here.
Pricing compared
Exa
Pure pay-as-you-go usage pricing with every operation individually published, no subscription, no minimum spend, no tiers, and no expiring credits.
- Free credits$0
- Search$7
- Contents and Answer$1 to $5
- Deep Search and Monitors$12 to $15
- Agent$0.012 to $1.00
- EnterpriseCustom
Compared as a contact data vendor, Exa is expensive: 1,000 emails costs 20 dollars against Tomba's 8.90, and 10,000 costs 200 against Tomba's 89. Phone numbers at 0.07 are 70 dollars per thousand and 700 per ten thousand, more than CUFinder's 299 for 10,000 mixed credits and well above SalesQL's 119 for 12,000. On that axis Exa loses to most of this batch. But that comparison misreads the product. What you are actually buying is the ability to find companies that no filter can describe, verify each one against your own criteria, and only then pay to enrich the survivors, with a research and monitoring layer on the same bill and no subscription underneath any of it. Nothing else in this category does that at any price. For a team whose bottleneck is knowing who to contact rather than how to reach them, 7 dollars per thousand searches with 10 dollars free every month is exceptional value. For a team that already has the list, it is simply the wrong tool.
TheirStack
Credit-based, sold either as a monthly subscription or as one-time packs with no subscription; unlimited team members and no per-seat charge.
- Free$0
- Monthly API subscription, entry$49
- Monthly API subscription, mid$169
- Monthly API subscription, high volume$400
- One-time credit packs$109
Model it at two volumes. A founder validating a market buys the $109 one-time pack, pulls 1,000 company records with their inferred stacks, and never pays again; at roughly 11 cents a record that is cheap for data nobody else has. A vendor running continuous outbound sits on the $169 monthly plan for 10,000 credits, or around 1.7 cents a credit, and pulls a few thousand qualified companies a month with the API doing the work. At $400 for 50,000 the unit cost falls under a cent. The pricing is the most honest in the category: no seats, no separate API bill, no annual lock-in, and a free tier that actually lets you check whether your buyers appear in job ads before you spend anything.
Editorial verdict on each
Exa
InnovationExa is the odd one out in this category and the most interesting thing in it. It does not sell a contact database, it sells the ability to ask the live web a question no filter can express, verify each answer against your own criteria, and attach an email or a phone number to the results that survive. Priced purely per operation with 10 dollars free every month, no subscription, and nothing that expires, it is the most transparent commercial model here by a distance, and a Series C at a 2.2 billion valuation means the API will still be there in three years. The honest caveats are that contact data costs more than twice Tomba's rate, there is no published match rate, the compliance documentation is written for a search company rather than a data vendor, and a non-technical salesperson will not enjoy using it. Buy Exa when the problem is deciding who to contact. Buy something cheaper when the problem is only how to reach them, and consider running both, which is what the teams getting the most out of it actually do.
Read the full Exa profileTheirStack
TheirStack is the best-priced serious signal tool in this category and the only sensible option if the software you sell lives somewhere a crawler cannot reach. Reading job ads rather than websites is not a clever workaround, it is a structurally better view of a company's internal stack, and 300,000 new postings a day gives it a freshness advantage that weekly-crawl vendors cannot close. Buy the $109 one-time pack first and check whether your buyers actually post job ads, because if they do not, nothing else about the product matters. If they do, the $169 monthly plan with unlimited seats and the API included is a genuinely cheap foundation for an account-selection motion. Just build the verification habit early: this is inference, every record links to the posting it came from, and the teams that read the source before dialling get very different results from the ones that trust the label.
Read the full TheirStack profileExa profile last reviewed 2026-08-22; TheirStack last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.