Magento 2 – How to programmatically check user is subscribed for newsletter or not?

Use Factory,
Magento\Newsletter\Model\SubscriberFactory

Using isSubscribed() method. You can check the user is a subscriber to the newsletter or not.

<?php
namespace Magemonkey\Subscriber\Model;

use Magento\Framework\Exception\LocalizedException;
use Magento\Newsletter\Model\SubscriberFactory;

class IsSubscribed
{
    /**
     * @var SubscriberFactory
     */
    private $subscriberFactory;

    /**
     * @param SubscriberFactory $subscriberFactory
     */
    public function __construct(
        SubscriberFactory $subscriberFactory
    ) {
        $this->subscriberFactory = $subscriberFactory;
    }

    /**
     * @param int $customerId
     * @return bool
     */
    public function isCustomerSubscribeById($customerId) {
        $status = $this->subscriberFactory->create()->loadByCustomerId((int)$customerId)->isSubscribed();

        return (bool)$status;
    }

    /**
     * @param string $email
     * @return bool
     */
    public function isCustomerSubscribeByEmail($email) {
        $status = $this->subscriberFactory->create()->loadByEmail($email)->isSubscribed();

        return (bool)$status;
    }
}

<?php

namespace Magemonkey\Subscriber\Model;

use Magento\Framework\Exception\LocalizedException;

use Magento\Newsletter\Model\SubscriberFactory;

class IsSubscribed

{

/**

* @var SubscriberFactory

private $subscriberFactory;

/**

* @param SubscriberFactory $subscriberFactory

public function __construct(

SubscriberFactory $subscriberFactory

) {

$this->subscriberFactory = $subscriberFactory;

}

/**

* @param int $customerId

* @return bool

public function isCustomerSubscribeById($customerId) {

$status = $this->subscriberFactory->create()->loadByCustomerId((int)$customerId)->isSubscribed();

return (bool)$status;

}

/**

* @param string $email

* @return bool

public function isCustomerSubscribeByEmail($email) {

$status = $this->subscriberFactory->create()->loadByEmail($email)->isSubscribed();

return (bool)$status;

}

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