Assertible
Assertible is a Houston-based SaaS platform that lets developers and QA professionals automate API and website testing via codeless HTTP assertions, specification sync with OpenAPI/Swagger/Postman, scheduled monitoring, post-deployment smoke tests, and integrations with GitHub, Slack, and PagerDuty.
- Company typePrivate
- Founded2016
- HeadquartersHouston, United States
- Headcount1–10
- GTM typeB2B
- OfferingSoftware
What Assertible does
Assertible, Inc. is a Houston, USA-based SaaS company that provides a unified web-service testing and monitoring platform targeted at software developers and QA professionals. Founded in 2016, the platform enables automated API and website testing through a no-code/codeless interface that supports HTTP assertions (status codes, JSON path, JSON Schema Draft 4 validation, XPath XML/HTML, response headers and time, text body, HTML validation, and link checking), scheduled monitoring, and post-deployment smoke tests across staging and production environments. A core technical differentiator is automatic synchronization of API tests with OpenAPI, Swagger, and Postman specification documents, which keeps assertions in step with specification changes and reduces manual test maintenance.
The platform exposes a Deployments API, Trigger API, Sync API, and a free public JSON Schema Validation API, with authentication via API tokens over Basic Auth. Native integrations span GitHub (status checks, PR deploys, Heroku Review Apps), Slack (failure and recovery notifications), PagerDuty (incident creation with auto-resolve), Zapier, email hooks, and CI/CD tools (CircleCI, Travis CI, Codeship, Wercker). Security features include RSA client-side encrypted variables for tokens, passwords, and secrets, and multi-auth support covering No Auth, Basic, Digest, API Token, OAuth 1.0a, OAuth 2.0, and session cookies.
Assertible operates a product-led, self-serve go-to-market motion with GitHub OAuth sign-up, a free tier, and paid plans on a monthly billing cadence that unlock per-minute schedules and higher service limits. The company is privately held with no disclosed venture funding rounds, no parent company, and no subsidiaries. Its visible customer base is concentrated in startups (Swap Tech, Safewill, Glassix, SimplyRETS, Identibyte, Grove Technologies, Pechakucha, Tech Creations, Tapa.cc, MyWheels) with Drift and Unbxd as the larger logos on the homepage.
Assertible firmographics
Firmographics- Name
- Assertible
- Legal name
- Assertible, Inc.
- Website
- https://assertible.com
- Company type
- Private
- Founded year
- 2016
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Assertible is a Houston-based SaaS platform that lets developers and QA professionals automate API and website testing via codeless HTTP assertions, specification sync with OpenAPI/Swagger/Postman, scheduled monitoring, post-deployment smoke tests, and integrations with GitHub, Slack, and PagerDuty.
- Ownership category
- akta.pro rank
Assertible industry classification
Industry- Product category
- API Testing and Monitoring Software
- SIC
- Services-Prepackaged Software (7372)
- akta.pro primary industry
- Enterprise Application Testing & QA Services (BPAEAGAI)
Keywords
Where Assertible is headquartered
LocationHeadquarters
- HQ city
- Houston
- HQ country
- United States
- HQ region
- North America
Markets served
Assertible business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Infrastructure, Marketing or Sales, Operations
Revenue model
- SaaS Subscription: Subscription-based SaaS model with free tier available and paid plans for more frequent schedules and higher limits.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Monthly | Free plan available |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels8 records
Assertible product offering
Product offeringCore offering
Assertible provides a SaaS platform for continuously testing and monitoring APIs and websites across staging and production environments. The platform enables developers and QA professionals to create automated HTTP assertions, sync tests with OpenAPI/Swagger/Postman specifications, trigger post-deploy smoke tests, and receive failure alerts via Slack, PagerDuty, email, and GitHub status checks. It also offers a free public JSON Schema Validation API and integrates with major CI/CD tools.
Product overview
Assertible is a unified web service testing and monitoring platform built around its core platform, which provides HTTP assertions, JSON path validation, specification sync (OpenAPI/Swagger/Postman), deployment tracking, and scheduled monitoring. The platform supports multi-environment testing with role-based team collaboration. Key sub-products include a free JSON Schema Validation API, encrypted variables for secure credential storage, jq-based variable manipulation, and authentication support (OAuth, Basic, Digest, API tokens). The product integrates natively with GitHub, Slack, PagerDuty, Zapier, and major CI/CD tools (CircleCI, Travis CI, Codeship, Heroku) for automated testing pipelines.
Differentiator
Problem solved
Functional benefit
Products and services
- Assertible (Core Platform) A unified SaaS platform that enables automated QA testing and monitoring of APIs and websites. Provides HTTP assertions (status code, JSON path, JSON Schema, XPath, response headers, response time, response text, HTML validation, link checking), test scheduling, deployment tracking, specification sync with OpenAPI/Swagger/Postman, multi-environment execution, and alerting via Slack, PagerDuty, email, and GitHub status checks. Targets developers, QA professionals, and engineering teams at startups through to enterprises.
- JSON Schema Validation API A free standalone public API at https://assertible.com/json that validates JSON documents against JSON Schema Draft 4 and returns validation errors and a valid status. Available to developers independently of the main Assertible subscription.
Quantifiable outcome
- Lower number of false positives in automated QA tests
- +1 more outcomes
Companies that use Assertible
Customer profileNamed customers12 records
Segments3 records
Ideal customer profiles2 records
Assertible technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration13 records
Feature11 records
Assertible partnerships and signals
Strategic signalPartnerships
Nine partnerships are on record, tiered core and infrastructure.
- GitHubcoreGitHub integration allows propagating deployment events and test failures to pull requests and commit references. Supports status checks on pull requests, automatic test execution on code push, and deployment tracking.
- SlackcoreSlack integration sends downtime and test failure notifications to team channels. Notifies when tests become healthy again. Supports viewing test results directly in Slack.
- PagerDutycorePagerDuty integration creates incidents when API tests are failing with configurable alert escalation policies and auto-resolve when tests start passing.
- HerokucoreHeroku integration supports automatic deployment events. Heroku Review Apps and Pipelines automatically post deployment events that trigger Assertible test execution.
- AWSinfrastructureAWS infrastructure hosting with documented issues (e.g., AWS us-west-2 region issues affecting jq assertions). Service health monitoring integrated.
- OpenAPI InitiativecoreSupport for OpenAPI Specification (OAS) for automatic test generation and syncing from API specifications.
- Swagger/OpenAPIcoreImport and sync tests from Swagger/OpenAPI specifications with automatic JSON Schema assertion creation.
- PostmancoreImport and automate API tests from Postman Collections (v2 or higher).
- CircleCIcoreCircleCI integration examples in documentation for running tests during builds and after deployments.
Scale indicators1 record
Recent moves6 records
Expansion highlights5 records
Assertible competitors and assessment
Company assessmentBroad incumbents
- Postman: Postman is the dominant API development and testing platform used by millions of developers. It competes with Assertible on API testing and collections, but covers a much broader API design, mocking, and collaboration surface.
- Datadog Synthetic Monitoring: Datadog offers synthetic API and browser tests as part of its observability platform, with alerting integrations and CI/CD hooks. It competes with Assertible but bundles testing into a much larger enterprise monitoring suite.
- New Relic Synthetics: New Relic provides scheduled API and scripted browser checks as part of its full-stack observability platform. It overlaps with Assertible's monitoring capabilities but serves enterprise observability buyers.
- Pingdom: Pingdom provides synthetic uptime and transaction monitoring as part of SolarWinds' observability portfolio. It competes with Assertible on scheduled API and website monitoring for SMB and mid-market customers.
- SmartBear ReadyAPI: SmartBear's ReadyAPI (formerly SoapUI) is an established functional and load API testing platform. It overlaps with Assertible on API assertions but targets enterprise QA teams with on-prem and licensed offerings.
Direct peers
- Checkly: Checkly provides API and browser synthetic monitoring with code-defined checks, scheduled runs, and alerting. It targets the same developer-led API testing and monitoring niche as Assertible.
- UptimeRobot: UptimeRobot offers HTTP/API uptime monitoring with alerting and a freemium self-serve model. It targets a similar SMB developer audience but with a narrower focus on availability rather than deep assertions.
- k6 (Grafana): k6 is a developer-centric load and API testing tool now part of Grafana Labs. It shares Assertible's CI/CD-driven, code-first testing audience and is increasingly positioned for synthetic monitoring.
- Runscope: Runscope (now part of Broadcom/Symantec via acquisition history) pioneered cloud-based API testing and monitoring. It overlaps directly with Assertible on scheduled API checks, assertions, and CI/CD integration.
Emerging players
- Better Stack (formerly Better Uptime): Better Stack combines uptime monitoring, incident management, and on-call scheduling with API/website checks. It targets the same PLG, SMB-developer motion as Assertible but with a broader observability scope.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
Assertible social profiles
Digital presenceAssertible financial estimates
Financial estimateRevenue estimate
Valuation estimate
Assertible leadership team
Management profileNumber of profiles
Profiles3 records
Assertible funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Assertible M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Assertible
What does Assertible do?
Assertible provides a SaaS platform for continuously testing and monitoring APIs and websites across staging and production environments. The platform enables developers and QA professionals to create automated HTTP assertions, sync tests with OpenAPI/Swagger/Postman specifications, trigger post-deploy smoke tests, and receive failure alerts via Slack, PagerDuty, email, and GitHub status checks. It also offers a free public JSON Schema Validation API and integrates with major CI/CD tools.
Is Assertible a public or private company?
Assertible is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Assertible founded?
Assertible was founded in 2016. It employs 1 to 10 people.
Where is Assertible based?
Assertible is headquartered in Houston, United States, in the North America region.
How does Assertible make money?
One revenue line is on record: saaS Subscription.
Who are Assertible's main competitors?
Broad incumbents on record are Postman, Datadog Synthetic Monitoring, New Relic Synthetics, Pingdom and SmartBear ReadyAPI. Direct peers are Checkly, UptimeRobot, k6 (Grafana) and Runscope. Better Stack (formerly Better Uptime) is listed as an emerging player.
Does Assertible have an API?
Yes. Assertible provides multiple APIs: (1) Deployments API at https://assertible.com/deployments for creating deployment events and running tests post-deployment, (2) Trigger API at https://assertible.com/apis/{id}/run for running tests from CI/CD pipelines or on-demand, (3) Sync API at https://assertible.com/imports/{id}/sync for syncing tests from OpenAPI/Swagger/Postman specifications, and (4) a free JSON Schema Validation API at https://assertible.com/json for validating JSON documents against JSON Schema Draft 4. Authentication uses API tokens passed via Basic Auth header. Developer documentation is at assertible.com/docs.
What industry is Assertible in?
Assertible's product category is API Testing and Monitoring Software. Its primary akta.pro industry code is BPAEAGAI, Enterprise Application Testing & QA Services. Its SIC code is 7372.