diff --git a/packages/core/package.json b/packages/core/package.json
index a412af3fa1..ccf2bce628 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -47,6 +47,7 @@
     "react": "^16.12.0",
     "react-dom": "^16.12.0",
     "react-helmet": "6.0.0",
+    "react-hook-form": "^5.7.2",
     "react-router": "6.0.0-alpha.5",
     "react-router-dom": "6.0.0-alpha.5",
     "react-sparklines": "^1.7.0",
diff --git a/packages/core/src/layout/SignInPage/customProvider.tsx b/packages/core/src/layout/SignInPage/customProvider.tsx
new file mode 100644
index 0000000000..8141175d8f
--- /dev/null
+++ b/packages/core/src/layout/SignInPage/customProvider.tsx
@@ -0,0 +1,111 @@
+/*
+ * Copyright 2020 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import React from 'react';
+import { useForm } from 'react-hook-form';
+import {
+  Grid,
+  Typography,
+  Button,
+  FormControl,
+  TextField,
+  FormHelperText,
+  makeStyles,
+} from '@material-ui/core';
+import isEmpty from 'lodash/isEmpty';
+import { InfoCard } from '../InfoCard/InfoCard';
+import { ProviderComponent, ProviderLoader, SignInProvider } from './types';
+import { SignInResult } from '@backstage/core-api';
+
+const ID_TOKEN_REGEX = /^[a-z0-9+/]+\.[a-z0-9+/]+\.[a-z0-9+/]+$/i;
+
+const useFormStyles = makeStyles(theme => ({
+  form: {
+    display: 'flex',
+    flexFlow: 'column nowrap',
+  },
+  button: {
+    alignSelf: 'center',
+    marginTop: theme.spacing(2),
+  },
+}));
+
+const Component: ProviderComponent = ({ onResult }) => {
+  const classes = useFormStyles();
+  const { register, handleSubmit, errors, formState } = useForm<SignInResult>({
+    mode: 'onChange',
+  });
+
+  return (
+    <Grid item>
+      <InfoCard title="Custom User">
+        <Typography variant="body1">
+          Enter your own User ID and credentials.
+          <br />
+          This selection will not be stored.
+        </Typography>
+
+        <form className={classes.form} onSubmit={handleSubmit(onResult)}>
+          <FormControl>
+            <TextField
+              name="userId"
+              label="User ID"
+              margin="normal"
+              error={Boolean(errors.userId)}
+              inputRef={register({ required: true })}
+            />
+            {errors.userId && (
+              <FormHelperText error>{errors.userId.message}</FormHelperText>
+            )}
+          </FormControl>
+          <FormControl>
+            <TextField
+              name="idToken"
+              label="ID Token (optional)"
+              margin="normal"
+              autoComplete="off"
+              error={Boolean(errors.idToken)}
+              inputRef={register({
+                required: false,
+                validate: token =>
+                  !token ||
+                  ID_TOKEN_REGEX.test(token) ||
+                  'Token is not a valid OpenID Connect JWT Token',
+              })}
+            />
+            {errors.idToken && (
+              <FormHelperText error>{errors.idToken.message}</FormHelperText>
+            )}
+          </FormControl>
+          <Button
+            type="submit"
+            color="primary"
+            variant="outlined"
+            className={classes.button}
+            disabled={!formState?.dirty || !isEmpty(errors)}
+          >
+            Continue
+          </Button>
+        </form>
+      </InfoCard>
+    </Grid>
+  );
+};
+
+// Custom provider doesn't store credentials
+const loader: ProviderLoader = async () => undefined;
+
+export const customProvider: SignInProvider = { Component, loader };
diff --git a/packages/core/src/layout/SignInPage/providers.tsx b/packages/core/src/layout/SignInPage/providers.tsx
index 8e5cc7fc54..d60c8ff281 100644
--- a/packages/core/src/layout/SignInPage/providers.tsx
+++ b/packages/core/src/layout/SignInPage/providers.tsx
@@ -17,6 +17,7 @@
 import React, { useLayoutEffect, useState, useMemo, useCallback } from 'react';
 import { guestProvider } from './guestProvider';
 import { googleProvider } from './googleProvider';
+import { customProvider } from './customProvider';
 import {
   SignInPageProps,
   SignInResult,
@@ -29,11 +30,12 @@ import { SignInProvider } from './types';
 const PROVIDER_STORAGE_KEY = '@backstage/core:SignInPage:provider';
 
 // Separate list here to avoid exporting internal types
-export type SignInProviderId = 'guest' | 'google';
+export type SignInProviderId = 'guest' | 'google' | 'custom';
 
 const signInProviders: { [id in SignInProviderId]: SignInProvider } = {
   guest: guestProvider,
   google: googleProvider,
+  custom: customProvider,
 };
 
 export const useSignInProviders = (