LangSmith users list

Email list of companies using LangSmith

Q: How many companies use LangSmith?

Data InfoMetrix tracks 17,250 companies using LangSmith, with 126,892 verified contacts at those accounts as of October 2026. The largest groups are AI-Native Startups, Enterprise Software and Financial Services. Counts are estimates from our database and market research, so ask us for a live count for your exact criteria.

Q: Who buys and manages LangSmith inside a company?

LangSmith is usually owned by LLM Application Observability & Evaluation. Decision-makers include CTO, Head of AI Engineering and VP of Engineering; AI Engineering Lead and ML Platform Lead shape the choice, and AI Engineers and Software Engineers use it day to day. Our LangSmith list can include any of these roles.

Q: Which LangSmith products or editions can I target?

You can target accounts by the LangSmith products they run, including LangSmith Developer, LangSmith Plus, LangSmith Enterprise, LangGraph Platform and LangSmith Evaluations. Tell us which edition or module matters and we filter the list to those accounts.

Q: What other software do LangSmith customers use?

LangSmith customers commonly also run LangChain, OpenAI, Anthropic, AWS and Pinecone. LangSmith is often connected to LangGraph, so users of those tools overlap heavily. We can filter any list by this kind of stack overlap.

Q: What are the main alternatives to LangSmith?

The main alternatives to LangSmith are Langfuse, Arize Phoenix and Braintrust. We also keep verified user lists for Braintrust, which is useful for competitive displacement campaigns.

Q: When are LangSmith customers most likely to buy?

Buying triggers we track for LangSmith accounts include agent production launch, LangGraph adoption, AI quality incident and funding round. A common pain point is debugging agents: Multi-step agents fail opaquely.

Q: Can Data InfoMetrix deliver a free sample LangSmith contact list before ordering?

Yes. Data InfoMetrix delivers a complimentary 10-record sample tailored to your target LangSmith criteria—including target job titles, company size, and region—delivered within one business day with no obligation.

Q: How does Data InfoMetrix guarantee email deliverability for LangSmith contacts?

Data InfoMetrix provides a 99% email deliverability guarantee on all LangSmith datasets. Every contact record undergoes real-time email verification within a 30 to 45-day refresh cycle, backed by a 1:1 hard bounce replacement policy for 30 days after delivery.

Reach AI engineering leaders using LangSmith (LangChain) to trace, evaluate and monitor LLM apps and agents.

17,250+Companies

126,892+Contacts

Updated Oct 7, 2026GDPR · CCPA99% accuracy

See sample data

Free LangSmith count + 10 sample records

17,250+ companies · 126,892+ contacts available

✓Exact count for your titles, regions and company size
✓10 verified sample records to check quality
✓Price quote within 1 business day

Trusted by B2B and enterprise revenue teams

How many companies use LangSmith?

Data InfoMetrix tracks 17,250+ companies running LangSmith as of October 2026, with 126,892+ verified contacts at those accounts. The largest groups are AI-Native Startups, Enterprise Software and Financial Services. Buying decisions usually sit with the CTO, Head of AI Engineering and VP of Engineering. Counts are estimates built from technology footprint scans, job-post signals and partner directories, checked by our research team. How we count

Tracked accounts17,250+

Organizations detected running LangSmith.

Verified contacts126,892+

Direct emails and phone dials for decision-makers.

Primary personasHead of AI Engineering, CTO, AI Platform Lead

Full buying committee mapped.

Deliverability SLA99%

SMTP-verified, with 1:1 replacement of any email that hard bounces within 30 days.

Data specification · Updated Q4 2026

Technology category	DevOps & Cloud Infrastructure
Tracked organizations	17,250+ verified accounts worldwide
Decision-maker contacts	126,892+ records with emails, mobile and direct dials
Key roles	Head of AI Engineering, CTO, AI Platform Lead, platform administrators, IT directors, procurement
Geography	180+ countries · country-by-country counts on request
Verification	DNS and script telemetry, 5-stage SMTP handshake, manual research
Refresh cadence	Continuous, 30–45 day maximum record age at delivery
Compliance	GDPR, CAN-SPAM, CCPA and CASL
Delivery	24–48 hours as CSV, XLSX or CRM API

Editorial & verification

Researched by the Data InfoMetrix research team. Counts updated October 2026.

How we count and verify data

Size your LangSmith audience

Pick a region, company size and buying role to estimate how many accounts and contacts you can reach.

Region

Company size

Buying role

Estimated segment✓ 99% SLA

17,250+Target accounts

126,892+Direct contacts

Decision-makers35%

Influencers45%

End users20%

Estimates from our current LangSmith dataset. Exact counts come with your quote.

Reach the whole buying committee

A LangSmith account is not one contact. We map the people who evaluate, buy, run and use it across LLM Application Observability & Evaluation.

Decision-makersC-suite & sponsors

CTOHead of AI EngineeringVP of EngineeringChief AI Officer

Influencers & adminsEvaluate & configure

AI Engineering LeadML Platform LeadProduct Engineering ManagerQA Lead

End usersRun it every day

AI EngineersSoftware EngineersData ScientistsQA Engineers

These are examples. We build records for any department, seniority or custom title.

See exactly what you get

Every record carries 60+ fields, from verified email, direct dial and LinkedIn to full postal address, LangSmith edition, coexisting stack and intent.

Contact	Buying role	Work email	Direct dial	Company phone	Fax	LinkedIn profile	Company	LinkedIn company page	Industry	Address 1	Address 2	City	State	ZIP code	Country	LangSmith footprint	Intent	Status
SRSophia ReyesVP of Platform Engineering	Decision Maker	s.r***@apexc**.io	+1 (415) 55*-**	+1 (415) 55*-**	+1 (415) 55*-**	linkedin.com/in/s*ia-r*******	Apex Cloud Systems Inc.	linkedin.com/company/apex-cloud-sys	Enterprise Software & Cloud SaaS	100 Montgomery St	Ste 1800	San Francisco	CA	94104	United States	LangSmith Enterprise Cloud & Multi-Region Workloads	High	✓ Verified 2026
MWMarcus WebbLead Site Reliability Engineer (SRE)	Influencer	m.we**@kensington*******.uk	+44 (20) 79*-**	+44 (20) 79*-**	+44 (20) 79*-**	linkedin.com/in/m*us-we******	Kensington Global Capital Ltd	linkedin.com/company/kensington-cap	Financial Services & Modern FinTech	25 Bank St Canary Wharf	—	London	Greater London	E14 5JP	United Kingdom	LangSmith Production Cluster & SRE Monitoring	High	✓ Verified 2026
LFLena FischerPrincipal Cloud Infrastructure Architect	Influencer	l.fi**@stack**.de	+49 (30) 55*-**	+49 (30) 55*-**	+49 (30) 55*-**	linkedin.com/in/l*a-fi******	StackLabs Infrastructure GmbH	linkedin.com/company/stacklabs-de	Cloud Hosting & Distributed Systems	Friedrichstraße 176-179	—	Berlin	Berlin	10117	Germany	LangSmith Core Platform & Infrastructure as Code	High	✓ Verified 2026
JOJames O'ConnorDirector of Cloud Operations & DevOps	Decision Maker	j.oc**@veloce****.com	+1 (312) 55*-**	+1 (312) 55*-**	+1 (312) 55*-**	linkedin.com/in/j*s-oc******	Veloce Global Logistics Corp	linkedin.com/company/veloce-logistics	Enterprise Supply Chain & Telematics IoT	233 S Wacker Dr	Ste 4200	Chicago	IL	60606	United States	LangSmith Continuous Deployment & Telemetry Pipelines	High	✓ Verified 2026
ALAstrid LindholmHead of Developer Experience & Tooling	Influencer	a.li**@nordi**.se	+46 (8) 55*-**	+46 (8) 55*-**	+46 (8) 55*-**	linkedin.com/in/a*id-li******	Nordic Digital Commerce AB	linkedin.com/company/nordicpay-ab	E-Commerce & High-Volume Retail Platforms	Hamngatan 15	—	Stockholm	Stockholm County	111 47	Sweden	LangSmith Developer Tooling & API Network	Medium	✓ Verified 2026
DVDavid VanceChief Technology Officer (CTO)	Decision Maker	d.va**@beacond****.com	+1 (703) 55*-**	+1 (703) 55*-**	+1 (703) 55*-**	linkedin.com/in/d*d-va******	Beacon Mission Systems Inc.	linkedin.com/company/beacon-tech	Defense, Aerospace & Industrial Automation	1850 Towers Crescent Plaza	—	Tysons	VA	22182	United States	LangSmith GovCloud / FedRAMP Authorized Cluster	High	✓ Verified 2026
RGRachel Green-CohenDirector of Cloud Infrastructure & DevSecOps	Influencer	r.co**@veritas****.org	+1 (617) 55*-**	+1 (617) 55*-**	+1 (617) 55*-**	linkedin.com/in/r*el-co******	Veritas Health Technologies Inc.	linkedin.com/company/veritas-health-sys	Digital Health & Clinical Cloud Systems	75 Francis St	—	Boston	MA	02115	United States	LangSmith Healthcare Dedicated VPC & HIPAA Compliance	Medium	✓ Verified 2026
YTYuri TanakaSenior SRE & Cloud Systems Engineer	Practitioner	y.ta**@biosynth*****.jp	+81 (3) 55*-**	+81 (3) 55*-**	+81 (3) 55*-**	linkedin.com/in/yi-ta******	BioSynthetix Genomic Systems KK	linkedin.com/company/biosynthetix-kk	Life Sciences & High-Performance Cloud Computing	Roppongi Hills Mori Tower	30F	Tokyo	Tokyo	106-6108	Japan	LangSmith High-Performance Computing (HPC) Node Cluster	Medium	✓ Verified 2026

Illustrative rows showing 20 of 60+ fields. Full records are unmasked.

We deliver 60+ data fields per record, including intent data. The sample shows a selection only. Tell us which fields you need, including any that aren't listed here, and we'll add them to your list.

Also available:Seniority & departmentJob functionTenure in roleEmployee countAnnual revenueSIC & NAICS codesParent companyWebsite & domainProduct editionContract & renewal timingIntent topics & scoreEmail verification date

How we prove an account runs LangSmith

No scraped résumés or stale directories. Three layers confirm a live installation before a contact reaches your list. Read our verification protocol

Pillar 1 · Telemetry

Live DNS & script signals

We inspect response headers, DNS MX and CNAME records and live JavaScript bundles to confirm a running LangSmith instance.

DNS · CNAME · MX recordsHTTP headers · JS bundles✓ Verified against live infrastructure

Pillar 2 · Operational intent

90-day hiring signals

We track job requisitions that ask for LangSmith skills, which shows ongoing budget and headcount.

Now hiringLangSmith Administrator

Now hiringLangSmith Architect

Now hiringLangSmith Engineer

Pillar 3 · Human & mailbox QA

Pre-delivery SMTP handshake

Each email is tested against the destination mail server, and titles are checked against current company rosters.

SMTP check ✓LinkedIn match ✓Title verified ✓

✓ Deliverable inbox and current role

Deliverability SLA

<3%

Maximum bounce rate, or we replace the contacts. Your sender reputation stays clean.

1:1 hard bounce replacement

Every email that hard-bounces within 30 days of delivery is replaced free, record for record.

24-hour pre-delivery ping

Live SMTP and MX checks right before we send your file.

Instant CRM import

Clean CSV or XLSX, ready for one-click import.

Ready for your outbound stack

Imports straight into the tools you use.

What are you trying to do?

Each campaign needs a different data strategy. Pick your goal to see how we build the audience.

Find companies on rival platforms and reach the people evaluating a move to, or away from, LangSmith.

Conquesting playbook

Pitch integrations, add-ons and complementary tools to companies already running LangSmith.

Ecosystem playbook

Build account lists around LangSmith deployment scale and engage the full committee across departments.

ABM playbook

Conquesting audienceSample

Langfuse

Arize Phoenix

Braintrust

→

LangSmith

Know the stack around every account

LangSmith rarely runs alone. Every record is tagged with the tools detected alongside it, so you can segment by complementary stacks.

AWS

Open the coexistence matrix

What LangSmith customers look like

Anonymised profiles of companies in our LangSmith dataset of 17,250+ accounts. Named accounts are shared in your free sample, never on a public page.

LangSmith account profiles · anonymised

Company size	Industry	Country	Employees	Revenue
Upper mid-market	AI-Native Startups	United States	1,000–4,999	$250M–$1B
SMB	Enterprise Software	United States	50–199	$10M–$50M
Enterprise	Financial Services	United Kingdom	10,000+	$5B+
Mid-market	Customer Support AI	United States	500–999	$100M–$250M
Mid-market	AI-Native Startups	Canada	200–999	$50M–$250M
Enterprise	Enterprise Software	Germany	5,000+	$1B+
Upper mid-market	Financial Services	United States	1,000–4,999	$250M–$1B
SMB	Customer Support AI	Australia	50–199	$10M–$50M

Markets we cover

United States

India

United Kingdom

Canada

Germany

Australia

Singapore

France

New Zealand

Netherlands

Plus 170 more countries. Ask for a country-by-country count of LangSmith accounts and we'll include it with your free sample.

Build the list your way

Every list is assembled from source to your product tier, job function, geography and revenue band. Nothing is a fixed export.

Editions & modules

Filter by what they actually run.

+LangSmith Developer+LangSmith Plus+LangSmith Enterprise+LangGraph Platform+LangSmith Evaluations

Firmographics

Match revenue, size and industry.

+Industry+$1M–$10B+ revenue+Headcount+Ownership & funding+HQ & branches

Geography

Target any territory.

+US & Canada+US states+UK, DACH, Nordics+APAC & ANZ+Metro clusters

Need multi-attribute segments? Open the Audience Builder

What LangSmith teams are struggling with

Know the friction before you reach out, and position your product where it matters.

Friction 1

Debugging agents

ImpactMulti-step agents fail opaquely.

OpportunityOffer tracing and reliability services.

Friction 2

Regression testing prompts

ImpactChanges break behaviour.

OpportunityPitch evaluation services.

Friction 3

Production monitoring

ImpactTeams need cost and quality metrics.

OpportunityOffer observability services.

Intent triggers we track

✓Agent production launch

✓LangGraph adoption

✓AI quality incident

✓Funding round

“The accuracy of their technographic data was outstanding. Every AWS contact we reached out to was actively running live production clusters.”

VP of Field Engineering, a cloud infrastructure companyName withheld at the client's request

Read the $2.2M ARR case study

LangSmith list questions, answered

How many companies use LangSmith?

Data InfoMetrix tracks 17,250 companies using LangSmith, with 126,892 verified contacts at those accounts as of October 2026. The largest groups are AI-Native Startups, Enterprise Software and Financial Services. Counts are estimates from our database and market research, so ask us for a live count for your exact criteria.

Who buys and manages LangSmith inside a company?

LangSmith is usually owned by LLM Application Observability & Evaluation. Decision-makers include CTO, Head of AI Engineering and VP of Engineering; AI Engineering Lead and ML Platform Lead shape the choice, and AI Engineers and Software Engineers use it day to day. Our LangSmith list can include any of these roles.

Which LangSmith products or editions can I target?

You can target accounts by the LangSmith products they run, including LangSmith Developer, LangSmith Plus, LangSmith Enterprise, LangGraph Platform and LangSmith Evaluations. Tell us which edition or module matters and we filter the list to those accounts.

What other software do LangSmith customers use?

LangSmith customers commonly also run LangChain, OpenAI, Anthropic, AWS and Pinecone. LangSmith is often connected to LangGraph, so users of those tools overlap heavily. We can filter any list by this kind of stack overlap.

What are the main alternatives to LangSmith?

The main alternatives to LangSmith are Langfuse, Arize Phoenix and Braintrust. We also keep verified user lists for Braintrust, which is useful for competitive displacement campaigns.

When are LangSmith customers most likely to buy?

Buying triggers we track for LangSmith accounts include agent production launch, LangGraph adoption, AI quality incident and funding round. A common pain point is debugging agents: Multi-step agents fail opaquely.

Can Data InfoMetrix deliver a free sample LangSmith contact list before ordering?

Yes. Data InfoMetrix delivers a complimentary 10-record sample tailored to your target LangSmith criteria—including target job titles, company size, and region—delivered within one business day with no obligation.

How does Data InfoMetrix guarantee email deliverability for LangSmith contacts?

Data InfoMetrix provides a 99% email deliverability guarantee on all LangSmith datasets. Every contact record undergoes real-time email verification within a 30 to 45-day refresh cycle, backed by a 1:1 hard bounce replacement policy for 30 days after delivery.

Sourcing and compliance. Business contacts come from public company sources, professional directories and opt-in publishing partners, then go through SMTP verification and human review. Lists are for B2B outreach: include an unsubscribe link and honour opt-outs (CAN-SPAM), and have a lawful basis such as legitimate interest when you email people in the EU or UK (GDPR). Read how we source and verify data