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Insomnia vs Postman, decided by the job
Both send every request a product team needs and both now keep collections in Git. They differ on where data lives, what a shared workspace costs, how the CLI reports in CI and who the tool is really built for. This compares them on those dimensions and says which one to pick.
- options
- 2
- dimensions
- 24
- checked
- October 2026
The short answer
Our recommendation
If your main job is testing APIs, pick Postman; if your main job is designing and building them, pick Insomnia. Postman has the deeper testing toolchain: a CLI that writes JUnit reports for v2.1 collections, hosted monitors, mock servers on every plan and the collection format most vendors and testers already use. Insomnia is the better API workbench, with OpenAPI design, Spectral linting, requests and mocks in one API Collection, and a free choice between local, encrypted cloud and Git storage.
Cost tips small teams towards Insomnia. Since March 2026 Postman’s Free plan is limited to one user, so any shared workspace means Team seats at a list price of $19 per user a month, billed annually. Insomnia’s free Essentials plan allows Git Sync for up to three users and unlimited collection runs, and Pro was listed at $12 per user a month on 13 October 2026. For a team of three developers sharing requests through Git, Insomnia costs nothing.
For a QA team building a regression pack that gates CI, Postman remains our default, mainly because the Inso CLI reports to the console and JSON rather than JUnit XML, and because Postman collections travel more easily between teams. Teams running Kong Gateway, or with rules against vendor clouds, should start in Insomnia.
Side by side
24 dimensions that actually decide it
Download or copy the table if you are writing this up for a decision record.
Insomnia
Open source API client from Kong with local, encrypted cloud or Git storage per project, OpenAPI design and the Inso CLI.
Apache 2.0 app; free Essentials, paid Pro and Enterprise
Postman
API platform with cloud workspaces, a Git-native mode since version 12, monitors, mocks and the Postman CLI for CI.
Proprietary; Free and Solo single-user, Team per user
| Dimension | Insomnia | Postman |
|---|---|---|
| Storage, accounts and collaboration | ||
Storage options Data residency rules and client contracts often decide this before features do. | Per project: Local Vault, Cloud Sync with end-to-end encryption, or Git Sync. | Cloud workspaces, or Collection v3 YAML in your repository through Local View. |
Use without an account | Scratch Pad works locally before you log in. | The lightweight client sends requests signed out; collections need a workspace. |
Git workflow Reviewable API definitions and tests are the reason most teams look at either tool’s Git mode. | YAML in a standard .git folder, with branching and a three-way merge view in the app. | Per-request YAML files; Git branches switch what Local View shows. |
Free collaboration The most common reason this comparison gets searched in 2026. | Git Sync for up to three users on free Essentials. | None. Free and Solo are single-user and cannot create a team. |
Sharing outside engineering | Cloud Sync projects shared within an organisation. | Shared workspaces, published documentation and public collections. |
| Building requests and APIs | ||
Protocols | REST, GraphQL, gRPC, WebSocket and server-sent events. | HTTP, GraphQL, gRPC, WebSocket, Socket.IO and MQTT. |
Spec-first design Linting a contract before code exists catches the cheapest defects. | OpenAPI spec, requests and Spectral linting together in one API Collection. | API definitions and governance rules, with checks in the CLI. |
Templating Old tutorials break when the template engine changes. | LiquidJS since version 13; Nunjucks syntax such as set and elif fails. | Double-brace variables resolved across global, collection, environment, data and local scopes. |
Mock servers | Cloud or self-hosted; 1,000 cloud mock requests a month on Essentials. | Hosted mock servers on every plan, plus local mocks from the CLI. |
Gateway integration | Kong Konnect routes sync in as collections and requests. | No Konnect sync; check its integration catalogue for your gateway. |
| Scripts and tests | ||
Scripting API | insomnia object with insomnia.test and insomnia.expect, Chai style. | pm API with pm.test and pm.expect, Chai BDD syntax. |
Libraries in scripts Shared helpers decide how a large collection ages. | Bundled libraries such as ajv, chai, lodash and uuid, plus some Node.js modules. | Sandbox with no ordinary module system; package library on paid plans for CLI use. |
Status code gotcha | response.status is the reason text; compare response.code for the number. | pm.response.to.have.status(200) checks the numeric code directly. |
Legacy test formats | Legacy unit tests hidden from 13.3 and planned for deprecation. | Scripts unchanged; the shift is from v2.1 JSON to v3 YAML. |
| Running in CI | ||
Command line runner | Inso CLI: inso run collection with --ci, plus a kong/inso Docker image. | Postman CLI: postman collection run. Newman is no longer maintained. |
CI reports Most CI test tabs read JUnit XML and nothing else. | Console reporters and JSON output; no JUnit XML. | JUnit, JSON and HTML for v2.1 collections; terminal only for v3. |
Spec linting in the pipeline | inso lint spec runs the same Spectral rules as the app. | Governance checks on API specifications from the CLI. |
Known CLI gaps | Reporting must be converted for JUnit dashboards. | No OAuth 2.0, no body files from the working directory, gRPC and GraphQL paid only. |
Scheduled monitoring A hosted schedule is cheap synthetic monitoring for staging and production. | Not offered on the plans; schedule Inso in your own CI. | Hosted monitors: 1,000 requests a month on Free, 10,000 on paid plans. |
| Cost and risk | ||
Licence | Apache 2.0 for the application source. | Proprietary. Free to install, no open source edition. |
Paid list prices, 13 October 2026 Read from each vendor’s pricing page today. Confirm billing terms before budgeting. | Pro $12 and Enterprise $45 per user a month; annual billing discounted. | Solo $9 a month; Team $19 per user a month billed annually; Enterprise quoted. |
Enterprise controls | SSO, SCIM, enforced storage types and vault integrations; self-serve up to 50 users. | Governance, security controls and pooled AI on Enterprise; SSO an add-on on Team. |
Recent breaking changes | Version 13 moved templates to LiquidJS and isolated plugins in a background window. | Version 12 introduced Collection v3 and retired Newman as the runner. |
Familiarity and ecosystem Onboarding time and vendor-published collections. | Smaller community; imports Postman collections readily. | The format most vendors publish and most testers already know. |
A tick marks the option we would pick on that row alone. Rows without a tick are close enough that the choice should come from elsewhere in the table. Checked October 2026; tool releases move quickly, so verify anything you are about to spend money on.
Pick one
Which one fits your situation
Find the list that describes your team, not the tool with the longest feature table.
Choose Insomnia if
- You design APIs spec-first and want OpenAPI, linting and requests in one place.
- Projects must stay on the device or in your own Git repository.
- Up to three people need to share collections and the budget is zero.
- You run Kong Gateway or Konnect.
- Script authors want bundled libraries such as ajv and lodash.
Choose Postman if
- The collection is a regression pack that gates CI and must publish JUnit results.
- You want hosted monitors on staging or production without building a scheduler.
- Support, product or partner teams read and run the collection.
- Vendors and other teams hand you Postman collections.
- An established Postman estate already works and people know its variable scopes.
What changes the answer
Conditions that reverse the recommendation
A recommendation with no stated limits is a guess. These are the situations where ours does not hold.
Your CI does not care about JUnit
If the exit code is your gate and results go to an artefact, Inso is enough, and Insomnia’s free Git Sync removes the seat cost.
You have converted everything to v3 YAML
Postman’s CLI writes JUnit only for v2.1 collections, so on v3 its reporting advantage over Inso largely disappears.
A vendor cloud is ruled out
Insomnia’s Local Vault and Git Sync keep request data under your control, and Enterprise can enforce which storage types are allowed.
The team is one person
For a single tester, Postman Free covers the client, the CLI, mocks and some monitoring, and the collaboration difference does not apply.
In detail
Where the differences actually bite
The dimensions from the table, with the reasoning that would not fit in a cell.
Storage is Insomnia’s real argument
Insomnia lets each project choose where it lives. Local Vault keeps data on the device. Cloud Sync stores projects in Kong’s cloud with end-to-end encryption, commits and branches. Git Sync stores project resources as YAML in a repository you own, and from 12.6 the project uses a standard .git folder, so ordinary Git tools work on it. Storage can be changed after a project is created, and Enterprise administrators can restrict which types are allowed.
That history matters. Insomnia 8.0, in 2023, introduced account sign-in with cloud synchronisation and a local-only Scratch Pad for people who did not want an account. Today the storage choice is explicit and per project, which is more flexible than most API clients offer.
Postman’s answer since version 12 is Local View: connect a workspace to a repository and collections are written as per-request YAML. It works well, but collections and environments still sit inside a signed-in workspace, and Cloud View is what consumers of the workspace see. If the requirement is that request data never touches a vendor service, Insomnia is easier to defend in a security review.
Reporting decides the CI choice
Postman’s documentation describes Newman as no longer maintained and unable to run collections created or updated in Postman 12. The Postman CLI replaces it, keeps most Newman flags, and writes JUnit, JSON and HTML reports, but only for v2.1 JSON collections. A v3 YAML collection produces the terminal report alone, so teams that convert for Git review should check their CI test tab before they do.
Inso runs collections with inso run collection, takes environments and --env-var overrides, and fails cleanly with --ci. Its reporters are console formats such as spec, dot and tap, plus JSON output with --output. There is no JUnit XML, so dashboards that read JUnit need a conversion step. Inso does have one thing Postman’s runner does not need: inso lint spec runs the same Spectral rules as the app, so an OpenAPI style guide can fail a build before an endpoint exists.
What each costs a growing team
Postman changed its plans in March 2026. Free is now one user with no team, Solo is a paid single-user plan at $9 a month, Team is $19 per user a month billed annually, and Enterprise is quoted. Before March 2026 a Free team could invite up to three users; legacy plans continue until renewal.
Insomnia’s Essentials plan is free, with unlimited local and cloud projects, unlimited collection runs, Git Sync for up to three users and 1,000 cloud mock requests a month. Pro was listed at $12 per user a month and Enterprise at $45, with Enterprise self-serve up to 50 users. The pricing page offers a discount for annual billing, so confirm which billing period applies to your quote.
For teams of one to three, Insomnia is cheaper. For larger teams both charge per seat, and the decision should come from features: Postman’s monitors and reporting against Insomnia’s design tools and storage control.
Before you commit
Mistakes teams make on this decision
Pasting Nunjucks templates into Insomnia 13
Version 13 renders template tags with LiquidJS. set becomes assign, elif becomes elsif and filter arguments use a colon. Simple variable references are fine; anything with logic needs checking.
Comparing insomnia.response.status with 200
In Insomnia scripts, response.status is the reason text such as OK. Assert on insomnia.response.code, or the test fails for a response that was actually correct.
Expecting JUnit XML from Inso
CI systems that read only JUnit show no results. Gate on the exit code, upload the JSON output, and convert it if a JUnit report is required.
Losing JUnit after a Postman v3 conversion
The Postman CLI writes JUnit only for v2.1 collections. Convert one collection end to end, including reporting, before converting the rest.
Hitting the free collaboration limits
Postman Free is one user; Insomnia Essentials allows Git Sync for three. The next hire is when the budget conversation starts, so plan it before then.
Choosing an API toolchain for a team?
QAble builds API regression suites and the pipelines around them. We will run a representative collection in both tools in your CI and show you the differences.
API testing servicesSwitching cost
Moving between Postman and Insomnia
Insomnia imports Postman v2.0 and v2.1 collections and environments, either as separate JSON files or as a ZIP of a full Postman data export. Kong documents that most Postman scripts are converted during import, with listed differences: collectionVariables maps to the base environment, insomnia.globals is not supported yet, and deprecated postman.* interfaces do not run. Global variables need a manual step after import, selecting the global environment under Base Environment in each collection.
Mock servers do not import and must be recreated in Insomnia, and Postman monitors have no hosted equivalent, so plan a scheduled CI job instead. Run imported collections in the Collection Runner before trusting them, then wire Inso into CI next to the existing Postman CLI job and compare results for a sprint before switching the gate.
Questions
Questions people ask before choosing
Is Insomnia better than Postman?
For designing APIs and for teams that want data kept locally or in their own Git repository, yes: Insomnia combines OpenAPI design, linting, requests and mocks, and lets each project choose its storage. For API test automation, Postman is usually better, because its CLI produces JUnit reports for v2.1 collections, it offers hosted monitors, and its collections are the format most teams share.
Is Insomnia free?
Yes. The application is open source under Apache 2.0, and the Essentials plan is free with unlimited local and cloud projects, unlimited collection runs, Git Sync for up to three users and a monthly allowance of 1,000 cloud mock requests. Pro and Enterprise are paid per user, listed at $12 and $45 a month on 13 October 2026.
Is Postman still free for teams?
No. Since March 2026 the Free plan is limited to one user and cannot create a team. Solo is a paid plan for one person, and shared workspaces need the Team plan, listed at $19 per user a month billed annually on 13 October 2026. Teams on older plans keep them until renewal.
Can Insomnia import Postman collections?
Yes. Insomnia imports Postman v2.0 and v2.1 collections and environments, individually or as a ZIP of a full Postman export, and converts most scripts automatically. Mock servers cannot be imported and must be recreated, and global variables need selecting under Base Environment after import.
Which is better for CI?
Postman, if your CI reads JUnit XML. The Postman CLI writes JUnit, JSON and HTML reports for v2.1 collections, and there is an official GitHub Action. Inso reports to the console and to JSON, so JUnit dashboards need a conversion step. Inso is stronger if you want OpenAPI linting in the same pipeline.
Can I store Insomnia and Postman collections in Git?
Both, now. Insomnia’s Git Sync writes projects as YAML in a standard .git folder and offers branching and a merge view in the app, free for up to three users. Postman 12’s Local View writes collections as per-request YAML files. Newman cannot run those v3 files, so Postman pipelines need the Postman CLI.
Can I use Insomnia and Postman together?
Yes. A common pattern is Insomnia for designing and linting the OpenAPI spec and for developer exploration, with Postman holding the regression collection that runs in CI and is shared with testers and support. Keep one tool as the owner of each collection, because maintaining the same requests in both quickly leads to drift.
What is the best free alternative to both?
Bruno, for teams that collaborate through Git. Its client and CLI are MIT licensed, need no account, impose no seat limit, and its CLI writes JUnit reports. Hoppscotch is the browser-based option, with a free cloud plan and a self-hosted Community Edition under MIT.
How we compared
How this comparison was put together
Postman is in daily use across our API work: we run it on client work for exploration, shared regression collections and CI gates with the Postman CLI. Insomnia we have evaluated rather than run long term, by importing real collections, running them with Inso and working through Kong’s documentation and release notes. Read the Insomnia rows as a careful evaluation, not as years of production use.
Where the two are close, the row carries no tick. Both handle REST, GraphQL, gRPC and WebSocket, both write Chai-style assertions and both store collections as YAML in Git. The rows that decide things are storage control, free collaboration limits, CI reporting and design tooling.
Prices and versions were checked on 13 October 2026 against postman.com/pricing, insomnia.rest/pricing and each vendor’s documentation. Insomnia 13 and Postman 12 both shipped breaking changes this year, so check current release notes before planning a move. If anything here is wrong, tell us and we will correct it.
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