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Technologies / Lemlist / OpenAI

Companies using Lemlist and OpenAI

20 companies in our data have public evidence for both Lemlist and OpenAI, and 9 name both in their own subprocessor list. Each company below links to the source for every claim. Our coverage is partial, so this is not everyone.

20companies use both
49%of Lemlist users
1%of OpenAI users
9name both as subprocessors

Companies using one are 3.6 times as likely as the average company in our data to show evidence of the other.

The companies

Strongest evidence first: a company naming both in its own subprocessor list comes before one seen on its website or in job postings.

Subprocessor listPrivacy policyWebsiteJob postings

CompanyLemlistOpenAI
BuddiesHRbuddieshr.comBuddiesHR provides HR tools for employee engagement, recognition, reviews, and HR automation that run inside Slack and Microsoft Teams.HR and recruiting
Contractifycontractify.ioContractify provides contract management software for finding, signing, and following up on contracts.LegalProductivity and collaboration
Emergentemergent.shEmergent is an AI-powered development platform that turns natural-language descriptions into functional applications, including websites, apps, dashboards, and SaaS tools.AI and machine learning
SmartAlexgetsmartalex.comSmartAlex is a voice AI that answers business phone calls, calls customer lists, replies on WhatsApp and website chat, books meetings and summarizes conversations.AI and machine learningCommunications
Hubstaffhubstaff.comHubstaff provides time tracking, productivity monitoring, and workforce analytics software, along with project cost budgeting, invoicing, and payments.
Lynklynk.soLynk provides an AI contract workspace for managing contracts.AI and machine learningConstruction
Matproofmatproof.comMatproof is a compliance software platform that collects evidence, runs tests and prepares audits across frameworks including DORA, NIS2, ISO 27001, SOC 2, GDPR and the EU AI Act.Compliance and risk
Prerenderprerender.ioPrerender.io converts website pages to HTML so search engines, AI systems, and social platforms can read them.Developer toolsMarketing
Propaneusepropane.aiPropane was a product that collected customer and competitor feedback from many tools into one place for product teams and their agents.Productivity and collaboration
askyazi.comYazi is a WhatsApp-native research platform that runs surveys, diary studies, and AI-moderated interviews and analyzes the responses.
bunny.netbunny.net provides a global edge platform combining CDN, security, and compute services.Cloud and infrastructure
Combinelycombinely.aiCombinely provides an AI coworker called Coco that prepares accounting work inside the tools accountants already use.AI and machine learningFinance and accounting software
Darwindarwindata.aiDarwin quantifies nature and physical climate risk in euros for investors and the companies they back.Compliance and riskData and analytics
Agent Fagent-f.aiAI and machine learningFinance and accounting software
GTM Brigadegtmbrigade.comGTM Brigade provides AI outbound and LinkedIn engagement tools that find warm leads from post reactions and comments and draft outreach.Sales
Jurojuro.comJuro provides an AI-native platform for agreeing and managing contracts end to end.Legal
ListPluslistplus.aiListPlus helps CRM teams, RevOps and GTM engineers find B2B leads and check and enrich contact data.Sales
Nova Analyticsnovadata.ioNova provides Amazon seller and vendor analytics covering sales, profit and loss, advertising, inventory, catalogue and search query performance.Data and analyticsE-commerce
sandsiv+sandsiv.comsandsiv+ provides an agentic Voice of the Customer platform for enterprises that collects feedback from surveys, calls, tickets and reviews and turns it into analysis and action plans.AI and machine learningData and analytics
Serviceformserviceform.comServiceform provides AI agents and chat, WhatsApp, ticketing, forms, booking and search tools for business websites.AI and machine learning

The two technologies

Lemlist is a platform for running outbound sales outreach. It is used to find and enrich leads, engage prospects across email, LinkedIn, calls, WhatsApp, and SMS, and monitor inbox deliverability.

Summarized from lemlist.com on 8 Nov 2026.

49% of the 41 companies we see using Lemlist also show the other.

All 41 companies using Lemlist19 name it as a subprocessor

OpenAI

AI and LLM providers

OpenAI is a platform that provides an API for building with OpenAI models. It is used to access models, tools, and services for tasks such as text generation, image generation, audio, and agents.

Summarized from developers.openai.com on 8 Nov 2026.

1% of the 3,822 companies we see using OpenAI also show the other.

All 3,822 companies using OpenAI2,880 name it as a subprocessorMore in AI and LLM providers

Industries

Among the companies above, by our own classification of their homepage.

AI and machine learning7Legal3Data and analytics3Productivity and collaboration2Compliance and risk2Finance and accounting software2Sales2

Other pairs

Companies with their own evidence for both.

More with Lemlist

Cloudflare41companiesGoogle Workspace37companiesAmazon Web Services23companiesHubSpot23companiesGoogle21companiesGoogle Tag Manager18companies

More with OpenAI

Cloudflare3,797companiesGoogle Workspace2,783companiesAnthropic2,309companiesAmazon Web Services2,103companiesStripe1,968companiesGoogle1,813companies

Questions

How many companies use both Lemlist and OpenAI?

20 companies in StrataDB's data have public evidence for both, and 9 of them name both in their own subprocessor list, the strongest evidence we hold. Our coverage is partial, so the real number is higher.

Which companies use Lemlist and OpenAI?

BuddiesHR, Contractify, Emergent, SmartAlex and Hubstaff, and 15 more companies. Each one links to the evidence behind it.

How does StrataDB know a company uses Lemlist and OpenAI?

From four kinds of public evidence: subprocessor lists, privacy policies, website code and job postings. Each is kept apart with its source and the date we saw it. A company missing here means we found no evidence, not that it does not use them.

Find every company using Lemlist and OpenAI

See the full list with the source for each company, and run the same lookup for any technology from the API, Claude or your browser.

  • Every company and vendor, with its public source
  • 100 API calls a month, plus MCP and the Chrome extension
  • Work email only. No card, no sales call