diff --git a/lib/ModalContext.js b/lib/ModalContext.js
index 8580246..b43dfe9 100644
--- a/lib/ModalContext.js
+++ b/lib/ModalContext.js
@@ -1,6 +1,8 @@
-import { createContext, useState } from 'react';
+import { createContext, useState, useRef } from 'react';
 import Modal from 'react-modal';
+import ReCAPTCHA from 'react-google-recaptcha';
 import recordConversion from 'utils/recordConversion';
+import validateEmail from 'utils/validateEmail';
 
 const customStyles = {
   overlay: {
@@ -12,7 +14,7 @@ const customStyles = {
     left: '50%',
     right: 'auto',
     bottom: 'auto',
-    marginRight: '-50%',
+    margin: '0 auto',
     transform: 'translate(-50%, -50%)',
     border: 'none',
   },
@@ -23,17 +25,52 @@ const ModalContext = createContext({
 });
 
 const ModalProvider = ({ children }) => {
+  const reCaptchaRef = useRef(null);
+
   const [currentModal, setCurrentModal] = useState(null);
   const modalIsOpen = currentModal !== null;
-  const closeModal = () => setCurrentModal(null);
 
   const [email, setEmail] = useState(null);
+  const [reCaptchaValidated, setReCaptchaValidated] = useState(false);
+  const [emailError, setEmailError] = useState('');
   const [submitting, setSubmitting] = useState(false);
+
+  const closeModal = () => {
+    setCurrentModal(null);
+    setEmail(null);
+    setSubmitting(false);
+    setEmailError('');
+  };
+
+  const onReCaptchaSuccess = async (captchaCode) => {
+    if (!captchaCode) {
+      return;
+    }
+
+    setReCaptchaValidated(true);
+  };
+
+  const onBlur = () => {
+    if (!email) {
+      setEmailError('Please enter your email address');
+    } else if (!validateEmail(email)) {
+      setEmailError('Invalid email address');
+    } else {
+      setEmailError('');
+    }
+  };
+
   const onSubmit = async (e) => {
     e.preventDefault();
+
+    if (!validateEmail(email) || !reCaptchaValidated) {
+      return;
+    }
+
     recordConversion();
+    setSubmitting(true);
+
     try {
-      setSubmitting(true);
       await fetch('/api/emails', {
         method: 'POST',
         redirect: 'follow',
@@ -43,61 +80,82 @@ const ModalProvider = ({ children }) => {
         },
         body: JSON.stringify({ email }),
       });
+    } finally {
+      setSubmitting(false);
+      reCaptchaRef.current.reset();
+
       const url = new URL(window.location.href);
       url.searchParams.set('note', 'thankyou');
       window.location.replace(url.toString());
-    } finally {
-      setSubmitting(false);
     }
   };
 
   return (
-    <ModalContext.Provider value={{ setCurrentModal }}>
-      {children}
-
-      {currentModal === 'requestPricingInfo' && (
-        <Modal
-          isOpen={modalIsOpen}
-          onRequestClose={closeModal}
-          style={customStyles}
-          contentLabel="Request Pricing Info Modal"
-        >
-          <div className="text-right mb1">
-            <button
-              className="SignUpForm__button p0 m0 small pointer"
-              onClick={closeModal}
-            >
-              ×
-            </button>
-          </div>
-          <form action="/api/emails" method="post" onSubmit={onSubmit}>
-            <label className="small">
-              <h3 className="mb1">
+    <>
+      <ModalContext.Provider value={{ setCurrentModal }}>
+        {children}
+
+        {currentModal === 'requestPricingInfo' && (
+          <Modal
+            isOpen={modalIsOpen}
+            onRequestClose={closeModal}
+            style={customStyles}
+            contentLabel="Request Pricing Info Modal"
+          >
+            <div className="text-right mb1">
+              <button
+                className="SignUpForm__button SignUpForm__button--close p0 m0 small pointer"
+                aria-label="Close modal"
+                onClick={closeModal}
+              >
+                ×
+              </button>
+            </div>
+            <form action="/api/emails" method="post" onSubmit={onSubmit}>
+              <label htmlFor="email" className="small">
                 Submit your email below and we&apos;ll send over our pricing
                 information.
-              </h3>
+              </label>
               <input
+                id="email"
                 name="email"
                 autoFocus
                 value={email}
+                aria-describedby="email_error"
+                onBlur={onBlur}
                 onChange={(e) => setEmail(e.target.value)}
-                className="SignUpForm__input SignUpForm--day-mode__input small p0 w100 inline-block"
+                className="SignUpForm__input SignUpForm--day-mode__input small p0 w100 mt1 inline-block"
                 type="email"
                 placeholder="hello@example.com"
               />
-            </label>
-            <div>
-              <input
-                className="SignUpForm__button p0 m0 small"
-                type="submit"
-                value={submitting ? 'Submitting...' : 'Submit'}
-                disabled={submitting}
-              />
-            </div>
-          </form>
-        </Modal>
-      )}
-    </ModalContext.Provider>
+              {emailError && (
+                <span
+                  id="email_error"
+                  className="SignUpForm__error tiny"
+                  aria-live="assertive"
+                >
+                  {emailError}
+                </span>
+              )}
+              <div>
+                <ReCAPTCHA
+                  ref={reCaptchaRef}
+                  className="SignUpForm__reCaptcha pt1"
+                  sitekey={process.env.NEXT_PUBLIC_RECAPTCHA_SITE_KEY}
+                  onChange={onReCaptchaSuccess}
+                />
+                <input
+                  className="SignUpForm__button p0 small"
+                  type="submit"
+                  value={submitting ? 'Submitting...' : 'Submit'}
+                  disabled={submitting || !reCaptchaValidated}
+                />
+              </div>
+            </form>
+          </Modal>
+        )}
+      </ModalContext.Provider>
+    </>
   );
 };
 
diff --git a/package.json b/package.json
index 82fe4d5..7537e19 100644
--- a/package.json
+++ b/package.json
@@ -18,6 +18,7 @@
     "react": "17.0.2",
     "react-calendly": "^4.1.1",
     "react-dom": "17.0.2",
+    "react-google-recaptcha": "^3.1.0",
     "react-modal": "^3.16.1",
     "react-remarkable": "^1.1.3",
     "react-swipeable": "^6.2.0",
diff --git a/styles/components/SignUpForm.scss b/styles/components/SignUpForm.scss
index 3048c7e..d25265c 100644
--- a/styles/components/SignUpForm.scss
+++ b/styles/components/SignUpForm.scss
@@ -7,6 +7,24 @@
     background-color: transparent;
   }
 
+  &__button:disabled {
+    color: color('gray');
+    cursor: not-allowed;
+  }
+
+  &__error {
+    color: color('error');
+  }
+
+  &__button--close {
+    color: color('black');
+  }
+
+  &__reCaptcha {
+    transform: scale(0.85);
+    transform-origin: 0 0;
+  }
+
   &--overlay-mode {
     &__input,
     &__button {
diff --git a/styles/config.scss b/styles/config.scss
index 010dd0e..7b28b9a 100644
--- a/styles/config.scss
+++ b/styles/config.scss
@@ -3,6 +3,7 @@ $colors: (
   'gray-darkest': #141414,
   'gray': #757575,
   'white': #ffffff,
+  'error': #900,
 );
 
 $breakpoints: (
diff --git a/utils/validateEmail.js b/utils/validateEmail.js
new file mode 100644
index 0000000..ef40149
--- /dev/null
+++ b/utils/validateEmail.js
@@ -0,0 +1,7 @@
+const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+
+const validateEmail = (email) => {
+  return emailRegex.test(email);
+};
+
+export default validateEmail;
diff --git a/yarn.lock b/yarn.lock
index f6a3b58..298e343 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2519,6 +2519,13 @@ hmac-drbg@^1.0.1:
     minimalistic-assert "^1.0.0"
     minimalistic-crypto-utils "^1.0.1"
 
+hoist-non-react-statics@^3.3.0:
+  version "3.3.2"
+  resolved "https://registry.yarnpkg.com/hoist-non-react-statics/-/hoist-non-react-statics-3.3.2.tgz#ece0acaf71d62c2969c2ec59feff42a4b1a85b45"
+  integrity sha512-/gGivxi8JPKWNm/W0jSmzcMPpfpPLc3dY/6GxhX2hQ9iGj3aDfklV4ET7NjKpSinLpJ5vafa9iiGIEZg10SfBw==
+  dependencies:
+    react-is "^16.7.0"
+
 http-cache-semantics@^4.0.0:
   version "4.1.0"
   resolved "https://registry.npmjs.org/http-cache-semantics/-/http-cache-semantics-4.1.0.tgz"
@@ -4025,7 +4032,7 @@ promise-inflight@^1.0.1:
   resolved "https://registry.npmjs.org/promise-inflight/-/promise-inflight-1.0.1.tgz"
   integrity sha1-mEcocL8igTL8vdhoEputEsPAKeM=
 
-prop-types@^15.7.2, prop-types@^15.8.1:
+prop-types@^15.5.0, prop-types@^15.7.2, prop-types@^15.8.1:
   version "15.8.1"
   resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.8.1.tgz#67d87bf1a694f48435cf332c24af10214a3140b5"
   integrity sha512-oj87CgZICdulUohogVAR7AjlC0327U4el4L6eAvOqCeudMDVU0NThNaV+b9Df4dXgSP1gXMTnPdhfe/2qDH5cg==
@@ -4164,6 +4171,14 @@ rc@^1.2.8:
     minimist "^1.2.0"
     strip-json-comments "~2.0.1"
 
+react-async-script@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/react-async-script/-/react-async-script-1.2.0.tgz#ab9412a26f0b83f5e2e00de1d2befc9400834b21"
+  integrity sha512-bCpkbm9JiAuMGhkqoAiC0lLkb40DJ0HOEJIku+9JDjxX3Rcs+ztEOG13wbrOskt3n2DTrjshhaQ/iay+SnGg5Q==
+  dependencies:
+    hoist-non-react-statics "^3.3.0"
+    prop-types "^15.5.0"
+
 react-calendly@^4.1.1:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/react-calendly/-/react-calendly-4.1.1.tgz#25ac2ff3e062e4c6a0aefb83b851bebf66a94a1c"
@@ -4178,7 +4193,15 @@ react-dom@17.0.2:
     object-assign "^4.1.1"
     scheduler "^0.20.2"
 
-react-is@^16.13.1:
+react-google-recaptcha@^3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/react-google-recaptcha/-/react-google-recaptcha-3.1.0.tgz#44aaab834495d922b9d93d7d7a7fb2326315b4ab"
+  integrity sha512-cYW2/DWas8nEKZGD7SCu9BSuVz8iOcOLHChHyi7upUuVhkpkhYG/6N3KDiTQ3XAiZ2UAZkfvYKMfAHOzBOcGEg==
+  dependencies:
+    prop-types "^15.5.0"
+    react-async-script "^1.2.0"
+
+react-is@^16.13.1, react-is@^16.7.0:
   version "16.13.1"
   resolved "https://registry.npmjs.org/react-is/-/react-is-16.13.1.tgz"
   integrity sha512-24e6ynE2H+OKt4kqsOvNd8kBpV65zoxbA4BVsEOB3ARVWQki/DHzaUoC5KuON/BiccDaCCTZBuOcfZs70kR8bQ==