Privacy policy

Superthread takes the security of your data and our infrastructure very seriously. We are committed to providing an environment that is safe, secure, and available to all of our customers all the time.

Last updated: September 2026

We are Superthread IO Ltd, the provider of the Superthread service. This is our Privacy Policy, which applies to personal data we process in the course of our business for our own purposes. Please read it carefully as it contains important information on how and why we collect, store, use and share personal information, your rights in relation to your personal information and who to contact in the event you have a complaint.

This Privacy Policy does not apply to personal data in the user accounts maintained by our customers – for example, data about team members collaborating on a project using Superthread, which we only store and process as a ‘data processor’ on our customers’ behalf. We do not use any personal data in user accounts for our own purposes. The customer is the 'data controller' of any personal data processed by them using the Superthread service. If you believe that one of our customers is using Superthread to process your personal data, please contact them direct with any questions about that processing.

We are happy to answer your questions about any of this – email us at [email protected].

Information we collect

We collect several different types of information for various purposes to provide and improve our service to you.

Types of data collected

While using our site, we may ask you to provide us with certain personally identifiable information that can be used to contact or identify you (“Personal Data”). Personally identifiable information may include:

Email address
First name and last name

We may use your Personal Data to contact you with newsletters, marketing or promotional materials and other information that may be of interest to you. You may opt out of receiving any, or all, of these communications from us by following the unsubscribe link or by emailing at [email protected].

Data that is Not Personal Data

We may create aggregated, de-identified or anonymised data from the Personal Data we collect, including by removing information that makes the data personally identifiable to a particular user. We may use such aggregated, de-identified or anonymised data and share it with third parties for our lawful business purposes, including to analyse, build and improve the Services and promote our business, provided that we will not share such data in a manner that could identify you.

Usage data

We may also collect information that your browser sends whenever you visit our website or when you access our site by or through a mobile device (“Usage Data”). This Usage Data may include information such as your computer's Internet Protocol address (e.g. IP address), browser type, browser version, the pages of our site that you visit, the time and date of your visit, the time spent on those pages, unique device identifiers and other diagnostic data. When you access our site with a mobile device, this Usage Data may include information such as the type of mobile device you use, your mobile device unique ID, the IP address of your mobile device, your mobile operating system, the type of mobile Internet browser you use, unique device identifiers and other diagnostic data.

Tracking cookies data

We use cookies and similar tracking technologies to track the activity on our site and we hold certain information. Cookies are files with a small amount of data which may include an anonymous unique identifier. Cookies are sent to your browser from a website and stored on your device. Other tracking technologies are also used such as beacons, tags and scripts to collect and track information and to improve and analyse our site. You can instruct your browser to refuse all cookies or to indicate when a cookie is being sent. However, if you do not accept cookies, you may not be able to use some portions of our site.

Examples of Cookies we use:

Session Cookies: We use Session Cookies to operate our site.
Preference Cookies: We use Preference Cookies to remember your preferences and various settings.
Security Cookies: We use Security Cookies for security purposes.

Connected accounts and AI agents

Superthread lets you connect third-party accounts – such as Gmail, Google Calendar and Slack – to Superthread AI agents. Connecting an account is always your choice: you decide which account to connect, which agent it is connected to, and what that agent is allowed to do. This section explains what data we access from connected accounts, how we use it, who can see it, and how long we keep it.

Where you connect an account as part of your organisation's Superthread workspace, we process this data on behalf of that customer as described in our Data Processing Terms. The commitments in this section apply in all cases.

Data we access

Gmail: email messages and threads, including headers (such as sender, recipients, subject and date), message content, labels and attachment details (file name, type and size – we do not read the contents of attachments); drafts the agent creates for you; and the mailbox settings needed to create filters, where you enable that.
Google Calendar: your list of calendars and your events, including title, description, time, location, attendees and their responses, and free/busy information.
Slack: messages, threads and reactions in the public and private channels you select for the agent; basic profile information (such as name and display name) of people in your Slack workspace; and details of files shared in those channels where the Slack app can access them. Agents do not access direct messages or any channel you have not selected.
Access tokens: the OAuth tokens that allow Superthread to access the account on your behalf. We never see or store your password for these accounts.

How we use this data

We only use data from connected accounts to provide the agent features you have set up and asked for, namely:

to run the triggers you configure – for example, when an email is received or sent, when a label is applied, when a calendar event is created, updated or cancelled, or when a message is posted, a reaction is added or the agent is mentioned in a selected Slack channel;
to let the agent read, search and summarise your email, calendar and Slack content when carrying out the instructions you or your team give it;
to take the actions you have enabled for that agent. Agents can create email drafts and replies. Only if you turn them on, agents can also send email, organise your inbox (for example applying labels, archiving, moving to trash, creating filters or unsubscribing), create, update or cancel calendar events, and post messages, reply in threads, add or remove reactions and edit messages the agent itself posted in Slack. By default, actions that change your mailbox, calendar or Slack workspace wait for your approval before they are carried out.

We do not use data from connected accounts for advertising, we do not sell it, and we do not use it to build profiles about you.

AI processing

To carry out agent tasks, the relevant content from your connected accounts is sent to our artificial intelligence sub-processors (Anthropic and OpenAI), who process it on our behalf under agreements that prohibit them from using it to train their models. Neither Superthread nor our AI providers use data from your connected accounts to develop, improve or train generalised AI and/or ML models.

Who can see this data

Data from a connected account is visible to you and to members of your Superthread workspace who have access to the agent that the account is connected to – for example, in the agent's results, run history and approval requests. We tell you this before you connect an account, so please only connect an account to an agent that the right people have access to.

Superthread staff do not read data from your connected accounts unless: (a) you give us explicit permission to do so for specific messages or events, for example when you ask us for support; (b) it is necessary for security purposes, such as investigating abuse or a security incident; (c) it is necessary to comply with applicable law; or (d) the data has been aggregated and anonymised and is used for internal operations.

We do not transfer data from connected accounts to anyone else, except to the sub-processors we need in order to provide the feature (such as Amazon Web Services for hosting and our AI sub-processors), where required by law, or as part of a merger, acquisition or sale of assets, in which case we will notify you.

Storage, retention and deletion

Data from connected accounts is stored in Superthread's primary data centre in the Amazon Web Services London region. Access tokens are encrypted at rest, and all data is encrypted in transit.

Content that an agent reads or produces while carrying out a task – such as the email that triggered it, or a draft it prepared for your approval – is kept in that agent's run history so that you and your team can review what the agent did. We keep it until the run history, agent or workspace is deleted, or until you ask us to delete it by emailing [email protected].

You can disconnect an account at any time from the agent's settings in Superthread. When you disconnect an account, we delete its access tokens, stop receiving updates from it and stop accessing it. You can also revoke Superthread's access at any time from your Google Account, or by removing the Superthread app from your Slack workspace.

Google user data

Superthread's use and transfer to any other app of information received from Google APIs will adhere to the Google API Services User Data Policy, including the Limited Use requirements.

Use of data

We use the collected data for various purposes:

to provide and maintain the Superthread service;
to notify you about changes to our website or our service;
to allow you to participate in interactive features of our site when you choose to do so;
to provide customer support;
to gather analysis or valuable information so that we can improve our website or our service;
to monitor the usage of our website or our service;
to detect, prevent and address technical issues;
to fulfil any other purpose for which you provide it;
to carry out our obligations and enforce our rights arising from any contracts entered into between you and us, including for billing and collection;
to provide you with notices about your account and/or subscription, including expiration and renewal notices, email-instructions, etc.;
to provide you with news, special offers and general information about other services and events which we offer that are similar to those that you have already purchased or enquired about unless you have opted not to receive such information;
in any other way we may describe when you provide the information;
for any other purpose with your consent.
to contact you with updates when we make changes or improvements to our product, and any other information that you may have opted into receiving. You may opt out of receiving any, or all, of these communications from us by following the unsubscribe link or by emailing at [email protected];

The legal basis on which we process your personal data

Like all organisations that process personal data in the UK and Europe, we are obliged to have a “Lawful Basis” for doing so. The Lawful Bases on which we process your personal data are as follows:

Legitimate Interest: this means the legitimate interest of us, and our customers, in our conducting and managing our business to enable us to give you the best service and the best and most secure experience when using our services. The legitimate interests include provision of services that we are contractually obliged by our customer to deliver to you; to provide and improve Superthread; to administer our relationship with you and our business; for marketing; and in order to exercise our rights and responsibilities under our customer terms and other contracts. We make sure we consider and balance any potential impact on you (both positive and negative) and your rights before we process your personal data for our legitimate interests. We do not use your personal data for activities where our interests are overridden by the impact on you (unless we have your consent or are otherwise required or permitted to by law). You can obtain further information about how we assess our legitimate interests against any potential impact on you in respect of specific activities by contacting us at [email protected].

Performance of Contract: this means processing your data where it is necessary for the performance of a contract between us and our customer, or to take steps at your request before entering into such a contract.

Legal Obligation: this means processing your personal data where it is necessary for compliance with a legal or regulatory obligation that we are subject to.

Consent: this means your affirmative, explicit consent.

Retention of data

We will retain your Personal Data only for as long as is necessary for the purposes set out in this Privacy Policy. We will retain and use your Personal Data to the extent necessary to comply with our legal obligations (for example, if we are required to retain your data to comply with applicable laws), resolve disputes, and enforce our legal agreements and policies. We will also retain Usage Data for internal analysis purposes. Usage Data is generally retained for a shorter period, except when this data is used to strengthen the security or to improve the functionality of our website or our service, or we are legally obligated to retain this data for longer time periods. We may further retain information in an anonymous or aggregated form where that information would not identify you personally. None of your data, even in an aggregated form is used to develop, improve, or train generalised AI and/or ML models.

Disclosure of data

We may disclose personal information that we collect, or you provide:

Under certain circumstances, we may be required to disclose your Personal Data if required to do so by law or in response to valid requests by public authorities.

We may disclose your data to third parties to whom we may choose to sell, transfer, or merge parts of our business or our assets. Alternatively, we may seek to acquire other businesses or merge with them. If a change happens to our business, then the new owners may use your personal data.

We may disclose your information also for:

Analytics

to other members of our group of companies;
to contractors, service providers, and other third parties we use to support our business, including Amazon Web Services which provide us with cloud hosting services;
to fulfil the purpose for which you provide it;
for any other purpose disclosed by us when you provide the information;
to comply with applicable laws, regulations or any judicial order;
to enforce our contractual rights under our customer terms of service or otherwise;
to protect the security, rights, privacy, safety and property of us, of you, or of others.

We may use third-party Service Providers to monitor and analyse the use of our service.

Amplitude: Amplitude is a product analytics service that tracks user activity within the Superthread app. We use the data collected in Amplitude to generate reports on product usage. For more information on the privacy practices of Amplitude, please visit the Amplitude Privacy Terms web page: amplitude.com/terms

Segment: Segment is a customer data platform that helps us centralise the collection of product usage data. Segment enables us to forward usage data to third-party analytics services such such as Amplitude or EcoSend. For more information on the privacy practices of Segment, please visit the Segment Privacy Terms web page: segment.com/legal/privacy

EcoSend (GoSquared): EcoSend is an email marketing platform operated by 'Go Squared Ltd.' EcoSend helps us better understand, contact, and market to our users. For more information on the privacy practices of GoSquared, please visit the GoSquared Privacy Terms web page: gosquared.com/legal/privacy

PostHog: PostHog is a product analytics service that tracks user activity within the Superthread app. PostHog also uses cookies on our site to track if a visitor is new or returning. We use the data collected in PostHog to generate reports on product usage and website activity. Superthread utilises PostHog's EU cloud infrastructure to ensure all data is collected and processed within the EU. For more information on the privacy practices of PostHog, please visit the PostHog Privacy Terms web page: posthog.com/privacy

Customer support

We may use third party software as part of providing live chat and customer support services.

Payments

We may provide paid products and/or services within Superthread. In that case, we use third-party services for payment processing (e.g. payment processors). We will not store or collect your payment card details. That information is provided directly to our third-party payment processors whose use of your personal information is governed by their Privacy Policy. These payment processors adhere to the standards set by PCI-DSS as managed by the PCI Security Standards Council, which is a joint effort of brands like Visa, Mastercard, American Express and Discover. PCI-DSS requirements help ensure the secure handling of payment information.

The payment processors we work with are:

Stripe: Stripe is a payment processor. Their Privacy Policy can be viewed at: stripe.com/gb/privacy

Security of data

We have appropriate security measures in place intended to prevent personal information from being accidentally lost or used or accessed in an unauthorised way. We limit access to your personal information to those who have a genuine business need to know it. Those processing your information will do so only in an authorised manner and are subject to a duty of confidentiality.

We also have procedures in place to deal with any suspected data security breach. We will notify you and any applicable regulator of a suspected data security breach where we are legally required to do so.

Transfer of data outside of Europe

Superthread's primary data centre is located in Amazon Web Services London region.

We may transfer your personal information to certain service providers located outside the UK and European Economic Area (EEA).

Some of our service providers are based in the USA. The USA does not have the same data protection laws as the United Kingdom and EEA. Whilst the UK and European Commission have not given a formal decision that the USA provide an adequate level of data protection similar to those which apply in the United Kingdom and EEA, any transfer of your personal information will be subject to appropriate safeguards as permitted under theGeneral Data Protection Regulation.

Some service providers outside the UK and EEA use specific contracts approved by the European Commission which give personal data the same protection it has in Europe. For further details, see https://ec.europa.eu/info/law/law-topic/dataprotection/data-transfers-outside-eu/model-contracts-transfer-personal-data-third-countries_en.

For more details regarding the safeguards in place regarding transfers to any individual service provider, please ask us at [email protected].

Your data protection rights under General Data Protection Regulation (GDPR)

If you are a resident of the European Union (EU) and European Economic Area (EEA), you have certain data protection rights, covered by GDPR. – See more at https://eur-lex.europa.eu/eli/reg/2016/679/oj. If you wish to exercise any of your rights in respect of our use of your data for our own purposes, please email us at [email protected]. Subject to certain exceptions, you have the following data protection rights:

the right to access, update or to delete the information we have on you;
the right of rectification. You have the right to have your information rectified if that information is inaccurate or incomplete;
the right to object. You have the right to object to our processing of your Personal Data;
the right of restriction. You have the right to request that we restrict the processing of your personal information;
the right to data portability. You have the right to be provided with a copy of your Personal Data in a structured, machine-readable and commonly used format;
the right to withdraw consent. You also have the right to withdraw your consent at any time where we rely on your consent to process your personal information;

Please note that we may ask you to verify your identity before responding to such requests.

You have the right to complain to a Data Protection Authority about our collection and use of your Personal Data. The supervisory authority in the UK is the Information Commissioner who may be contacted at https://ico.org.uk/concerns/ or telephone: 0303 123 1113. For more information if you are in the European Economic Area, please contact your local data protection authority in the EEA.

If you would like to exercise any rights in respect of any of your personal data in a user account of a customer of the Superthread service (e.g. your employer or ex-employer), please contact the customer.

Links to other sites

Our service may contain links to other sites that are not operated by us. If you click a third-party link, you will be directed to that third party's site. We strongly advise you to review the Privacy Policy of every site you visit. We have no control over and assume no responsibility for the content, privacy policies or practices of any third-party sites or services.

Children's privacy

Our service does not address anyone under the age of 18 (“Children”). We do not knowingly collect personally identifiable information from anyone under the age of 18. If you are a parent or guardian and you are aware that your Child has provided us with Personal Data, please contact us. If we become aware that we have collected Personal Data from children without verification of parental consent, we take steps to remove that information from our servers.

Changes to this privacy policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page. Where the change is material, we will let you know via email and/or a prominent notice on the site, prior to the change becoming effective.

Contact us

If you have any questions about this Privacy Policy, please contact us by email: [email protected], or by post to 15 Green Close, Chelmsford, England, CM1 7SL