Is Plaid Safe? Here's the Direct Answer for Investors

Image showing dashboards to show how aggregation through Plaid provides value for investors


Short answer: yes. Plaid is SOC 2 Type II certified, ISO 27001 and ISO 27701 certified, and uses bank-level AES-256 encryption. Plaid never sees your brokerage login after the first connection, and Ziggma never sees it at all. Here's exactly how the connection works, what data moves where, and what to do if you're still unsure.

Quick Answer

Plaid is safe for linking your investment accounts. Plaid is SOC 2 Type II certified, ISO 27001 and ISO 27701 certified, and encrypts data with AES-256 both at rest and in transit. Plaid uses OAuth wherever a broker supports it, which means Plaid receives a secure token instead of your username and password. Plaid has no major breach of its core systems on record. Apps like Ziggma that connect through Plaid never see or store your brokerage login credentials.

Certifications

SOC 2 Type II, ISO 27001, ISO 27701

Encryption

AES-256, at rest and in transit

Connection method

OAuth tokens, no shared passwords

What is Plaid?  What does  Plaid do?

Plaid is a financial data network, not a bank or a broker. Plaid connects apps like Ziggma to over 12,000 banks, brokerages, and retirement platforms, including Fidelity, Charles Schwab, Robinhood, and Coinbase. More than 8,000 apps use Plaid, including well-known names like Venmo, Cash App, and Robinhood itself.

When you link a brokerage account to Ziggma, Plaid sits between Ziggma and your broker. Plaid handles the connection, then passes your holdings, balances, and transaction data to Ziggma in a secure, read-only format. Ziggma uses this data purely for portfolio analytics: diversification scoring, impact analysis, dividend tracking, and risk metrics.

What Plaid can access

Account balances, holdings, positions, and transaction history — read-only, for the accounts you choose to connect.

What Plaid cannot do

Plaid cannot place trades, move money, or change account settings. Read-only access means no write permissions.

Ziggma also uses Snaptrade as a second account aggregation provider, depending on which broker you're connecting. Both Plaid and Snaptrade operate on the same core principle: OAuth-based, read-only connections that never expose your login credentials to the receiving app.

How the OAuth Connection Works

OAuth is the standard that eliminates password sharing. Most major brokers, including Fidelity, Schwab, and Robinhood, support OAuth through Plaid. Here's what happens when you click "Link Account" in Ziggma.

1

You select your broker inside Ziggma

Plaid's connection window opens. This window is hosted by Plaid, not Ziggma.

2

You log in directly with your broker, through Plaid's interface

If your broker supports OAuth, you're redirected to your broker's own login page. Your username and password go to your broker — never to Plaid, and never to Ziggma.

3

Your broker issues a token to Plaid

This token authorizes Plaid to retrieve your account data. The token can be revoked at any time, by you, without changing your broker password.

4

Plaid passes your holdings data to Ziggma

Ziggma receives balances, positions, and transactions — encrypted in transit — and uses this data to power your Portfolio Checkup, diversification score, and impact analysis.

Plaid's Security Certifications, Explained

Plaid holds three major independent certifications. Each one means a third-party auditor reviewed Plaid's systems and confirmed they meet a specific standard.

Certification What it covers What it means for you
SOC 2 Type II Security, availability, and confidentiality controls, audited over time (not just a point in time). Plaid's security controls were tested for effectiveness over an extended audit period, not just on paper.
ISO 27001 International standard for information security management systems. Plaid has a documented, audited process for identifying and managing security risks across its infrastructure.
ISO 27701 Extension of ISO 27001 focused specifically on privacy information management. Plaid has audited controls for how personal data is handled, stored, and limited — not just how it's secured.
AES-256 encryption Encryption standard used by financial institutions and governments. Your data is encrypted both while stored and while moving between Plaid, your broker, and Ziggma.
24/7 monitoring Continuous automated surveillance for suspicious access patterns across Plaid's network. Unusual account activity is flagged and investigated on an ongoing basis, not just during scheduled reviews.

Is Plaid Safe? vs. Is Plaid Private? Two Different Questions

Security and privacy are different questions, and Plaid's track record on each looks different. Security asks whether someone could break in and steal your data. Privacy asks what data Plaid collects, how long it's kept, and what happens to old connections.

On security: strong

Plaid has no major breach of its core systems on record as of 2026. Its SOC 2, ISO 27001, and ISO 27701 certifications require annual re-audits, not a one-time check.

Plaid built its own multi-factor authentication layer for brokers that don't offer one, and it monitors connections continuously for unusual access patterns.

On privacy: worth understanding

In 2022, Plaid settled a class action lawsuit over how much account data it retained from earlier versions of its product, before its current consent and data-minimization practices were in place.

Today, Plaid lets you view and revoke app connections through Plaid Portal at any time. Reviewing old connections periodically — for apps you no longer use — is good practice regardless of which aggregator an app relies on.

How Ziggma Connects to Your Accounts

Ziggma uses Plaid and Snaptrade to connect to over 12,000 brokers and retirement platforms, including Fidelity, Schwab, Robinhood, and Webull. Every connection is read-only, OAuth-based where your broker supports it, and your login credentials are never seen or stored by Ziggma. For a full breakdown of how your data is encrypted and stored, see how Ziggma keeps your data secure.

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Is Plaid safe to link to my brokerage account?
Yes. Plaid is SOC 2 Type II, ISO 27001, and ISO 27701 certified, and encrypts data with AES-256. Plaid has no major breach of its core systems on record as of 2026. Apps that use Plaid, including account aggregators like Ziggma, receive read-only access to your account data.
Does Plaid see my brokerage username and password?
Not if your broker uses OAuth, which Fidelity, Schwab, Robinhood, and most major brokers do. With OAuth, you log in directly on your broker's own page, and your broker issues a secure token to Plaid instead of sharing your credentials. Learn more about how OAuth connections work at Ziggma.
Can Plaid move money out of my account?
No. The connection Ziggma uses through Plaid is read-only. Plaid can retrieve balances, holdings, and transaction history, but it cannot place trades, transfer funds, or change account settings.
What is the difference between Plaid and Snaptrade?
Plaid and Snaptrade are both account aggregation providers that Ziggma uses to connect brokerage and retirement accounts. Which one is used for a given connection depends on which provider your specific broker integrates with. Both use OAuth-based, read-only connections and maintain comparable security certifications. See a full Snaptrade vs. Plaid comparison.
Has Plaid ever had a data breach?
As of 2026, Plaid has no major breach of its core systems on record. In 2022, Plaid settled a class action lawsuit related to data retention practices from earlier versions of its product — a privacy and consent issue, not a security breach. Plaid's current product uses OAuth and data-minimization practices that address those earlier concerns.
Why does my investing app need Plaid at all?
Apps like Ziggma don't have direct relationships with every bank and broker. Plaid maintains those connections — over 12,000 of them — so that portfolio tracking tools can pull your holdings data without building and maintaining thousands of individual integrations.
Can I revoke Plaid's access to my account?
Yes. You can disconnect a linked account at any time from within Ziggma, or review and revoke app connections directly through Plaid's own connection management portal. Revoking access does not affect your broker login or password.
Does Ziggma store my brokerage login credentials?
No. Ziggma never sees or stores your brokerage username or password. Plaid and Snaptrade handle authentication directly with your broker, then pass Ziggma your account data — encrypted, and limited to holdings, balances, and transactions. Full details are on the Ziggma security page.
What data does Ziggma actually receive through Plaid?
Ziggma receives your account holdings, balances, and transaction history. This data powers features like the Portfolio Checkup, diversification scoring, dividend tracking, and portfolio impact analysis. Ziggma does not sell this data or share it with third parties for marketing purposes.
How do I link my brokerage account to Ziggma?
Click "Link Account" inside Ziggma, search for your broker, and follow the secure connection flow through Plaid or Snaptrade. The full walkthrough is in how to link a brokerage account to Ziggma. If you'd rather not connect live accounts yet, you can also create a free Ziggma account and add holdings manually.