CoverDoc.ai is an AI-powered tool that creates custom cover letters in minutes, along with tools to prepare for interviews and to negotiate pay. It works in multiple languages and integrates with LinkedIn, so it's good for job seekers around the world. Pricing is flexible, including a free starter plan, so it's a good way to get a leg up on your job search.
Another option is Cover Letter AI, which uses AI to create a cover letter based on your uploaded CV and input. The tool is designed with data privacy in mind, since it doesn't store job information on its servers, and it offers a few different pricing tiers, including a free plan to try it out.
If you're looking for a more general career assistant, JobBuddy can generate cover letters and optimize your resume for particular job descriptions. It also can provide practice interview questions tailored to your own needs, which can help you stand out and get more interview invitations. The service costs $5 per month for a JobSeeker tier with premium features.