Coresignal 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
Both sides assessedCoresignal compared with TheirStack
TheirStack takes job postings and does the extraction and intent work for you, with a web app a salesperson can use, from $49 a month with the API included in the same credits. Coresignal sells the underlying records across jobs, companies, and people, and expects you to build the interpretation. Buy TheirStack if you want answers; buy Coresignal if you want records to build on, or if you need employee and company data alongside the hiring signal.
TheirStack compared with Coresignal
Coresignal sells raw employee, company, and job posting data through an API from $49 a month, aimed at teams loading it into their own systems. TheirStack sells the same underlying kind of signal with the extraction and the intent layer already done, plus a web app a non-engineer can use. Take Coresignal if you are building a data product and want records; take TheirStack if you want answers to prospecting questions without writing a pipeline.
Choose Coresignal if
Technical go-to-market operators building their own account scoring or job-change alerting, recruiting and HR tech builders, investment analysts screening private companies at scale, and anyone already running Clay who wants a cheaper, deeper source behind their enrichment waterfalls.
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 | Coresignal | TheirStack |
|---|---|---|
| Category | Signals | Signals |
| Starting price | $49 per month (Mini, 2,500 credits) (7 days trial) | Free tier on signup, then $49 per month for 1,500 credits or $109 once for 1,000 credits (free plan available) |
| Pricing model | Credit-based API subscriptions billed monthly or annually, with credits consumed per record retrieved; bulk datasets are quoted separately by contract length and scope. | 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 | No | Free credits on signup with access to job search, company search, company lookup, enrichment, exports, and email alerts, at low volume. |
| Free trial | 7 days with 2,000 credits | Not a time-limited trial; a free credit allowance is included on signup |
| Best for | Technical go-to-market operators building their own account scoring or job-change alerting, recruiting and HR tech builders, investment analysts screening private companies at scale, and anyone already running Clay who wants a cheaper, deeper source behind their enrichment waterfalls. | 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 | A day for a working API integration if you have an engineer, and about an hour if you are consuming it through Clay or the self-service dashboard. The trial credits are enough to validate coverage on your specific segment before you commit. | 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 steep depending on your route in. The Elasticsearch DSL filtering is powerful and not immediately obvious, and understanding the credit model well enough to avoid a surprise bill takes a careful read of the documentation. | 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 APIs for companies, employees, and jobs, Agentic Search API, MCP server, Self-service dashboard, Flat files in CSV, JSONL, and Parquet | Web application, REST APIs for jobs, companies, technographics, and buying intents, MCP servers, CSV export |
| Compliance | GDPR aligned, CCPA aligned, Certified by the Ethical Web Data Collection Initiative | Job posting data is published business information rather than personal data, which keeps privacy exposure low, No publicly advertised SOC 2 attestation |
| Founded | 2016 | 2021 |
| Headquarters | Vilnius, Lithuania | Barcelona, Spain |
| Ownership | Privately held | Privately held |
Strengths and limitations
Coresignal
Strengths
- Genuine scale across three datasets with history back to 2016, which makes change detection possible rather than just snapshots.
- Job posting records at 1 credit each are the cheapest hiring signal in this category by a wide margin.
- Developer surfaces are unusually complete: Elasticsearch DSL filtering, webhooks, an Agentic Search API, and an MCP server, all included on the $49 plan rather than gated to enterprise.
- Delivery options span the full range from an API call to Parquet files landing in Snowflake, so the same vendor works for a two-person team and a data platform.
Limitations
- This is infrastructure, not a product. There is no scoring, no routing, no sequencing, and no CRM integration, so a go-to-market team needs either engineering support or Clay sitting on top.
- Credit costs differ by an order of magnitude between datasets, and the pricing page's headline credit counts make plans look far more generous than they are for people data.
- No website technographics or storefront data at all, so it complements rather than replaces the crawler-based tools in this category.
- Employee profile freshness depends on people updating their own public profiles, which means a job change can be weeks or months old before it becomes detectable, and some never surface.
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
Coresignal
Credit-based API subscriptions billed monthly or annually, with credits consumed per record retrieved; bulk datasets are quoted separately by contract length and scope.
- Free trial$0
- Mini$49
- Starter$199
- Pro$499
- Growth and above$1,000
Model it at two volumes. A small team on Mini at $49 pulling 2,500 job postings a month is paying about 2 cents a posting for hiring signal, which is excellent; the same $49 spent on employee profiles buys around 150 people, or roughly 33 cents each, which is expensive against a general contact database. That asymmetry is the whole story. At Pro, $499 for 35,000 credits gets you around 2,000 enriched people or 35,000 job postings a month at 1.4 cents a credit. Coresignal is outstanding value for hiring and company data and merely competitive for people data, and the right way to buy it is to be very deliberate about which dataset you are actually consuming.
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
Coresignal
Coresignal is the best-documented raw data source a small technical team can buy in this category, and it is priced so that job posting and hiring signal work is genuinely cheap while people data is merely fair. The developer surfaces are the giveaway about who it is for: Elasticsearch queries, webhooks, an MCP server, and Parquet files in your warehouse are not features aimed at a sales rep. Buy it if you are building something, whether that is a job-change alerting job, an account growth score, or a product with a talent graph underneath it. Buy it through Clay if you want the depth without the pipeline. Do not buy it expecting a tool that tells you who to call today, and do not size a plan on headline credit counts without checking that an employee record costs twenty times what a job posting does.
Read the full Coresignal 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 profileCoresignal 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.