Skip to content
SPECIFICTION
Get listed

Seam

seam.co

From $5/mo Free trial WebWindowsmacOSLinuxiOSAndroid
Visit seam.co
Spec score 8.6 #3 of 24 in Gym Access Control Software

What it is

Seam provides an API that developers and businesses can use to connect applications with IoT devices and automate access, energy, and monitoring. It identifies vacation rentals, hospitality, multifamily housing, gyms and sports, and coworking as use cases. The Access Grants API handles PIN codes, mobile keys, key cards, Instant Keys, schedules, and device events. Webhooks deliver access and device updates in a common format across connected brands. Teams can view device status, organize devices by location, and troubleshoot remotely; Seam Bridge links on-premises access systems and offline devices. Its iOS and Android SDKs enable app-based mobile keys for Bluetooth and NFC doors, while web components work with React or plain HTML and CSS and adapt to desktop and mobile interfaces. Seam lists Android, iOS, web, and API platforms and says it connects to thousands of devices and brands, though catalog listings do not guarantee supported integrations. Plans include a free option and paid plans from $5/mo.

Spec sheet

What it does
Seam provides one API for connecting locks, thermostats, sensors and cameras so applications and AI agents can automate physical-world operations.Read 14 Oct 2026 · seam.co
Product
Seam provides an API for developers and businesses to connect applications to IoT devices and automate access, energy, and monitoring.Read 30 Sep 2026 · seam.co
Integrations
The integration catalog lists brands including Yale, August, Schlage, Brivo, Salto, Dormakaba, Nest, ecobee, Ring, Verkada and many others, while warning that catalog inclusion does not guarantee support.Read 14 Oct 2026 · seam.co
Compliance
Seam's Trust Center offers access to SOC 2 reports and other compliance documents by request.Read 30 Sep 2026 · seam.co
Support
All Seam customers receive email help and help-center access, with paid support plans offering faster response times and dedicated support.Read 30 Sep 2026 · seam.co
Company
The about page describes Seam as building infrastructure for developers and businesses to connect applications with IoT devices; it does not state its headquarters or founding year.Read 30 Sep 2026 · seam.co
Access control
The Access Grants API issues PIN codes, mobile keys and cards with people, spaces and time windows specified in one request.Read 14 Oct 2026 · seam.co
Access features
The Access Grants API supports PIN codes, mobile keys, key cards, Instant Keys, access schedules, and device events.Read 30 Sep 2026 · seam.co
API documentation
The documentation includes quickstarts, capability guides, API references, webhooks, test accounts, device integrations and production go-live guidance.Read 14 Oct 2026 · seam.co
API extensibility
Public repositories provide SDKs, generated TypeScript types, a CLI, React components and an MCP integration.Read 14 Oct 2026 · github.com
API key security
Seam says it stores only a short token and hash after generating API keys and treats keys like passwords.Read 14 Oct 2026 · seam.co
Camera monitoring
Camera integrations can emit motion events and provide event clips, thumbnails and media URLs.Read 14 Oct 2026 · seam.co
CLI
The Seam CLI is installable through npm, Homebrew, Scoop, standalone binaries, AUR and Nix on supported systems.Read 14 Oct 2026 · github.com
Company founding
Y Combinator lists Seam as founded in 2020, batch S20, with San Francisco as its location.Read 14 Oct 2026 · ycombinator.com
Company legal name
The company identifies itself as Seam Labs, Inc.Read 14 Oct 2026 · seam.co
Company size
Y Combinator lists a team size of 25.Read 14 Oct 2026 · ycombinator.com
Credential handling
OAuth is preferred; when unavailable Seam may store refresh tokens or encrypted device credentials depending on manufacturer capabilities.Read 14 Oct 2026 · seam.co
Device management
The dashboard groups connected devices by location, shows status and supports remote troubleshooting.Read 14 Oct 2026 · seam.co
Founders
Y Combinator lists Sy Bohy and Dawn Ho as founders.Read 14 Oct 2026 · ycombinator.com
Funding and backers
Y Combinator says Seam is backed by Tiger Global, Root VC, Stripe, Plaid and Airbnb founders or executives, plus other angels and funds.Read 14 Oct 2026 · ycombinator.com
Independent review
Trauth Review rated Seam 4.4 out of 5 and described it as a smart-lock developer API rather than a host-facing product.Read 14 Oct 2026 · trauthdairy.com
Integration limitation
Seam's integrations catalog states that listing a brand does not guarantee that its integration is supported.Read 30 Sep 2026 · seam.co
Limit: cost at scale
Trauth Review warned that per-device pricing rising from $5 to $50 monthly could become expensive for large portfolios.Read 14 Oct 2026 · trauthdairy.com
Limit: Trustpilot complaint
The sole Trustpilot reviewer alleged that prepaid credit expired without clear notice and that restoring access required paying substantially more.Read 14 Oct 2026 · uk.trustpilot.com
Mobile keys
Seam says mobile keys unlock Bluetooth and NFC doors in an app using its iOS and Android SDKs.Read 30 Sep 2026 · seam.co
Mobile SDKs
Documentation describes iOS and Android SDKs for mobile keys using Bluetooth and NFC.Read 14 Oct 2026 · seam.co
Noise monitoring
Noise sensors support configurable decibel thresholds, quiet hours and webhook alerts without recording conversations.Read 14 Oct 2026 · seam.co
Notable news: Access Grants
On May 15, 2026 Seam announced general availability of Access Grants across its stable provider lineup and said the beta had served more than 300,000 individuals.Read 14 Oct 2026 · seam.co
Offline devices
Seam Bridge connects on-premises access control systems and offline devices with Seam.Read 30 Sep 2026 · seam.co
Offline systems
Seam Bridge connects on-premises access-control systems and other offline devices to the cloud API.Read 14 Oct 2026 · seam.co
Open-source licensing
Seam's published SDK, CLI and component repositories use the MIT license, while the hosted Seam platform itself is not self-hostable.Read 14 Oct 2026 · github.com
Permission limitation
When manufacturers lack OAuth or granular permissions, Seam says it cannot yet offer a firm timeline for user-selectable capability restrictions.Read 14 Oct 2026 · seam.co
Platform support
Seam Components can be integrated into web projects using frontend frameworks such as React or plain HTML and CSS, and adapt across desktop and mobile interfaces.Read 30 Sep 2026 · seam.co
Praise: G2 usability
A verified G2 reviewer said the product was easy to use, including prompt writing and data synchronization, and that the team helped when needed.Read 14 Oct 2026 · g2.com
Rating on G2
4.9 out of 5 from 7 reviews.Read 14 Oct 2026 · g2.com
Rating on Trustpilot
3.2 out of 5 from 1 review.Read 14 Oct 2026 · uk.trustpilot.com
SDK languages
Official SDKs are listed for JavaScript, Python, Ruby, PHP, Java, C#, Go, iOS, Android and MCP.Read 14 Oct 2026 · seam.co
Security controls
The trust center lists monitored controls for identity, encryption, organizational security, network security, availability, incident response, vendor risk and vulnerability management.Read 14 Oct 2026 · seam.co
Self-hosting
The product is delivered as Seam-hosted infrastructure; the official materials describe API, dashboard and bridge components but no self-hosted server edition.Read 14 Oct 2026 · seam.co
Support plan prices
The pricing page lists Growth support at $0/yr included, Premium at $20,000/yr, and Enterprise at $50,000/yr.Read 30 Sep 2026 · seam.co
Supported devices
Seam says its platform connects to thousands of supported devices and brands, while its integrations catalog cautions that catalog inclusion does not guarantee a supported integration.Read 30 Sep 2026 · seam.co
Thermostats
The platform can set thermostat temperatures, modes, presets and schedules across manufacturers.Read 14 Oct 2026 · seam.co
Use cases
Seam identifies vacation rentals, hospitality, multifamily, gyms and sports, and coworking among its use cases.Read 30 Sep 2026 · seam.co
Web components
Seam Components are white-label UI elements usable with React, plain HTML/CSS and other frontend frameworks.Read 14 Oct 2026 · seam.co
Webhook security
Webhook signatures use HMAC with SHA-256.Read 14 Oct 2026 · seam.co
Webhooks
Seam provides webhooks for access and device updates in a common format across connected brands.Read 30 Sep 2026 · seam.co

Plans and prices

Free Trial Free 14 day free trial Full API access · Webhooks · All supported brands Read 14 Oct 2026 · seam.co
Unit Access $5 a month per device/month 5 actions/device/day · Priority email support · Full API access · Webhooks · All supported brands Read 14 Oct 2026 · seam.co
High Traffic $50 a month per device/month Unlimited actions · Priority email support · Full API access · Webhooks · All supported brands Read 14 Oct 2026 · seam.co
Enterprise Priced on request Custom pricing Dedicated Slack channel · Custom contracts · Volume pricing from 500+ devices · Dedicated support engineer · No usage limits Read 14 Oct 2026 · seam.co
Free Price not published Full API access · Webhooks · All supported brands · Free trial Read 30 Sep 2026 · seam.co

Every Seam plan and price →

Strong points and limits

Strong points

  • Access Grants cover PINs, mobile keys, cards, and schedules
  • Webhooks standardize access and device updates
  • Bridge connects offline and on-premises devices
  • Free plan and free trial are listed

Limits

  • Brand listings do not guarantee supported integrations
  • Paid plans start at $5/mo
  • Premium support costs $20,000/yr

Who it suits

Seam suits developers and operators connecting IoT devices to applications, particularly in access-focused settings such as rentals, hospitality, and coworking. Its API, web components, and mobile SDKs serve teams building across web and mobile platforms.

Seam in depth

Read the full write-up

Seam is an API platform for developers and businesses building services around connected devices and access. It suits teams that need credentials, device events, and operations across locations; its main caveat is that a brand appearing in the integrations catalog does not guarantee a supported integration.

Overview

Seam connects applications to IoT devices for access, energy, and monitoring. Its use cases include vacation rentals, hospitality, multifamily housing, gyms and sports, and coworking. Rather than being just a door-management app, it provides infrastructure for integrating devices into other products and workflows. That is a strong fit for teams building their own connected service, but less so for buyers seeking a finished access-control product with no development work.

The platform says it connects to thousands of devices and brands, but catalog inclusion alone is not assurance that a particular integration is supported. Confirm the exact brand and integration before making Seam the basis of an operational rollout.

Key features

Credentials and access rules

The Access Grants API supports PIN codes, mobile keys, key cards, Instant Keys, access schedules, and device events. Membership validation, scheduled access rules, mobile credentials, and multi-location access add useful coverage for operators managing recurring users and access across sites. The range is practical for product teams that need to choose how users enter and when credentials work, while the API-centered approach means teams should expect to build the experience around those capabilities.

Seam's iOS and Android SDKs support mobile keys for Bluetooth and NFC doors within an app. This makes sense for businesses that want access embedded in their own mobile product; it is not the same proposition as adopting a ready-made consumer app.

Events and device operations

Webhooks deliver access and device updates in a common format across connected brands, which can spare developers from handling each brand's event format separately. Users can check device status, group devices by location, troubleshoot remotely, and scale operations. Those capabilities matter most to teams responsible for a device portfolio; they cannot compensate for an unsupported device integration.

Offline systems and web components

Seam Bridge connects on-premises access-control systems and offline devices with Seam, extending the platform beyond devices that are directly online. Seam Components can be integrated into web projects built with frameworks such as React or with plain HTML and CSS, and adapt to desktop and mobile interfaces. This gives teams more than one way to present access functionality, though web components and SDKs still call for implementation work.

Security and support

Seam says it encrypts service data in transit, applies least-privilege system access, and requires personnel to use strong passwords and multi-factor authentication. Its Trust Center provides access to SOC 2 reports and other compliance documents by request. All customers receive email help and help-center access; paid support plans add faster response times and dedicated support, with Premium and Enterprise priced at $20,000/yr and $50,000/yr respectively. Growth support is included at $0/yr.

Pricing

Seam has a free plan and a free trial. The Free plan includes full API access, webhooks, and all supported brands, making it a sensible starting point for evaluation or a small initial integration. Unit Access costs $5 a month and includes 5 actions/device/day, priority email support, full API access, webhooks, and all supported brands. That daily action cap is the key trade-off for lower-volume use.

High Traffic costs $50 a month and keeps priority email support, full API access, webhooks, and all supported brands while allowing unlimited actions. It suits workloads that exceed Unit Access's per-device daily limit. Enterprise has custom pricing and offers dedicated Slack, custom contracts, volume pricing starting at 500+ devices, a dedicated support engineer, and no usage limits; it is aimed at larger deployments that need tailored terms and support.

The listed support tiers are separate from those plans: Growth is $0/yr included, Premium is $20,000/yr, and Enterprise is $50,000/yr. The published plan terms do not give a trial length or renewal conditions.

Platforms

Seam supports Android, iOS, web, and API. The mobile SDKs are relevant to teams embedding mobile keys in apps, while the API and web components serve application and browser-based implementations.

Who it's for

Seam is best for developers and businesses in vacation rentals, hospitality, multifamily, gyms and sports, or coworking that need to connect access devices to their own applications and manage activity across locations. It is a weaker choice when a buyer needs a turnkey access product or cannot verify that its specific device integration is supported.

Pros and cons

Pros: One API covers several credential types, schedules, and device events, giving product teams flexibility in how they build access workflows.

Pros: Normalized webhooks and remote device-management tools support operations across connected brands and locations.

Pros: The Free plan includes full API access and webhooks, so teams can evaluate core capabilities before choosing a paid tier.

Cons: A catalog brand may not have a supported integration, so buyers must confirm device compatibility before committing.

Cons: Unit Access is capped at 5 actions/device/day; higher-activity use requires the $50 a month High Traffic plan or custom-priced Enterprise.

Cons: The SDK and component model is for teams building their own experience, not buyers looking for a complete access app without development.

Alternatives

For gym operators comparing access tools, Gym Access Control Software is a useful category starting point. Sentry Interactive is another paid option with Android, iOS, web, and API support. re:membr Access Control is a paid alternative for Android, iOS, and web, while Beckon Access offers a free plan and a paid Club management Add-on at €99 a month for memberships, contracts, user accounting, SEPA direct debit, and online payments.

GymAxess has no free plan and charges €10 a month per door license or €50 a month per location license, making its licensing basis worth comparing with Seam's action-based tiers. KisiFit has no free plan and starts at $99 a month for a location-based Base plan with up to two locations and one door. Avigilon Alta Access offers paid Basic and Premium plans with API and webhooks, alerts, reports, and support features, at custom pricing. Brivo Security Suite is a paid alternative with monthly subscriptions priced through a reseller. Kisi has no free plan and starts at $99 a month for its One Security Platform, with discounts for annual contracts.

Verdict

Choose Seam if you are building a device-connected service and want a flexible API for credentials, events, and multi-location operations, with a free plan for getting started. Look elsewhere if you need a turnkey access-control product or cannot confirm support for the specific brands your deployment depends on.

Verdict

Seam combines device connectivity with access controls, webhooks, and tools for managing devices across locations. Check whether a specific brand integration is supported before relying on it.

Where Specifiction places it

Alternatives to SeamAll alternatives →