diff --git a/crypto/verificationhelper/verificationhelper_test.go b/crypto/verificationhelper/verificationhelper_test.go
index d0bf2298..af4a28c3 100644
--- a/crypto/verificationhelper/verificationhelper_test.go
+++ b/crypto/verificationhelper/verificationhelper_test.go
@@ -2,6 +2,7 @@ package verificationhelper_test
 
 import (
 	"context"
+	"database/sql"
 	"fmt"
 	"os"
 	"testing"
@@ -65,11 +66,20 @@ func initServerAndLoginAliceBob(t *testing.T, ctx context.Context) (ts *mockServ
 func initDefaultCallbacks(t *testing.T, ctx context.Context, sendingClient, receivingClient *mautrix.Client, sendingMachine, receivingMachine *crypto.OlmMachine) (sendingCallbacks, receivingCallbacks *allVerificationCallbacks, sendingHelper, receivingHelper *verificationhelper.VerificationHelper) {
 	t.Helper()
 	sendingCallbacks = newAllVerificationCallbacks()
-	sendingHelper = verificationhelper.NewVerificationHelper(sendingClient, sendingMachine, nil, sendingCallbacks, true)
+	senderVerificationDB, err := sql.Open("sqlite3", ":memory:")
+	require.NoError(t, err)
+	senderVerificationStore, err := NewSQLiteVerificationStore(ctx, senderVerificationDB)
+	require.NoError(t, err)
+
+	sendingHelper = verificationhelper.NewVerificationHelper(sendingClient, sendingMachine, senderVerificationStore, sendingCallbacks, true)
 	require.NoError(t, sendingHelper.Init(ctx))
 
 	receivingCallbacks = newAllVerificationCallbacks()
-	receivingHelper = verificationhelper.NewVerificationHelper(receivingClient, receivingMachine, nil, receivingCallbacks, true)
+	receiverVerificationDB, err := sql.Open("sqlite3", ":memory:")
+	require.NoError(t, err)
+	receiverVerificationStore, err := NewSQLiteVerificationStore(ctx, receiverVerificationDB)
+	require.NoError(t, err)
+	receivingHelper = verificationhelper.NewVerificationHelper(receivingClient, receivingMachine, receiverVerificationStore, receivingCallbacks, true)
 	require.NoError(t, receivingHelper.Init(ctx))
 	return
 }
diff --git a/crypto/verificationhelper/verificationstore_test.go b/crypto/verificationhelper/verificationstore_test.go
new file mode 100644
index 00000000..a3b1895d
--- /dev/null
+++ b/crypto/verificationhelper/verificationstore_test.go
@@ -0,0 +1,87 @@
+package verificationhelper_test
+
+import (
+	"context"
+	"database/sql"
+
+	_ "github.com/mattn/go-sqlite3"
+	"github.com/rs/zerolog"
+	"go.mau.fi/util/dbutil"
+
+	"maunium.net/go/mautrix/crypto/verificationhelper"
+	"maunium.net/go/mautrix/id"
+)
+
+type SQLiteVerificationStore struct {
+	db *sql.DB
+}
+
+const (
+	selectVerifications            = `SELECT transaction_data FROM verifications`
+	getVerificationByTransactionID = selectVerifications + ` WHERE transaction_id = ?1`
+	getVerificationByUserDeviceID  = selectVerifications + `
+		WHERE transaction_data->>'their_user_id' = ?1
+		  AND transaction_data->>'their_device_id' = ?2
+	`
+	deleteVerificationsQuery = `DELETE FROM verifications WHERE transaction_id = ?1`
+)
+
+var _ verificationhelper.VerificationStore = (*SQLiteVerificationStore)(nil)
+
+func NewSQLiteVerificationStore(ctx context.Context, db *sql.DB) (*SQLiteVerificationStore, error) {
+	_, err := db.ExecContext(ctx, `
+		CREATE TABLE verifications (
+			transaction_id   TEXT  PRIMARY KEY NOT NULL,
+			transaction_data JSONB NOT NULL
+		);
+		CREATE INDEX verifications_user_device_id ON
+			verifications(transaction_data->>'their_user_id', transaction_data->>'their_device_id');
+	`)
+	return &SQLiteVerificationStore{db}, err
+}
+
+func (s *SQLiteVerificationStore) GetAllVerificationTransactions(ctx context.Context) ([]verificationhelper.VerificationTransaction, error) {
+	rows, err := s.db.QueryContext(ctx, selectVerifications)
+	if err != nil {
+		return nil, err
+	}
+	return dbutil.NewRowIter(rows, func(dbutil.Scannable) (txn verificationhelper.VerificationTransaction, err error) {
+		err = rows.Scan(&dbutil.JSON{Data: &txn})
+		return
+	}).AsList()
+}
+
+func (vq *SQLiteVerificationStore) GetVerificationTransaction(ctx context.Context, txnID id.VerificationTransactionID) (txn verificationhelper.VerificationTransaction, err error) {
+	zerolog.Ctx(ctx).Warn().Stringer("transaction_id", txnID).Msg("Getting verification transaction")
+	row := vq.db.QueryRowContext(ctx, getVerificationByTransactionID, txnID)
+	err = row.Scan(&dbutil.JSON{Data: &txn})
+	if err == sql.ErrNoRows {
+		err = verificationhelper.ErrUnknownVerificationTransaction
+	}
+	return
+}
+
+func (vq *SQLiteVerificationStore) FindVerificationTransactionForUserDevice(ctx context.Context, userID id.UserID, deviceID id.DeviceID) (txn verificationhelper.VerificationTransaction, err error) {
+	row := vq.db.QueryRowContext(ctx, getVerificationByUserDeviceID, userID, deviceID)
+	err = row.Scan(&dbutil.JSON{Data: &txn})
+	if err == sql.ErrNoRows {
+		err = verificationhelper.ErrUnknownVerificationTransaction
+	}
+	return
+}
+
+func (vq *SQLiteVerificationStore) SaveVerificationTransaction(ctx context.Context, txn verificationhelper.VerificationTransaction) (err error) {
+	zerolog.Ctx(ctx).Debug().Any("transaction", &txn).Msg("Saving verification transaction")
+	_, err = vq.db.ExecContext(ctx, `
+		INSERT INTO verifications (transaction_id, transaction_data)
+		VALUES (?1, ?2)
+		ON CONFLICT (transaction_id) DO UPDATE
+			SET transaction_data=excluded.transaction_data
+	`, txn.TransactionID, &dbutil.JSON{Data: &txn})
+	return
+}
+
+func (vq *SQLiteVerificationStore) DeleteVerification(ctx context.Context, txnID id.VerificationTransactionID) (err error) {
+	_, err = vq.db.ExecContext(ctx, deleteVerificationsQuery, txnID)
+	return
+}