Instituto Camões Portuguese
The Instituto Camões Portuguese is a website developed by the Portuguese government that offers self-study Portuguese courses for A1 – C1 learners. Each twelve-week course requires about five hours per week of self-study. The self-study modules incorporate reading, listening comprehension, and grammar, while the basic and premium plans add speaking and writing practice (with the support of a weekly or bi-weekly tutor).
The courses appear to follow a natural progression through the levels, although you will probably find it difficult to go from A1 – C1 without a regular tutor. They also offer a beginner course tailored to Spanish speakers, which may accelerate your learning if you already have a strong grasp of Spanish.
Although the courses are significantly more expensive than those in Practice Portuguese, the self-study program is comparable to a monthly membership with Portuguese Lab. The premium option may be helpful for the intensive learner who wants to thoroughly cover the CEFR levels. Alternatively, you could use an italki tutor with the self-study plan.
We have not tested the course ourselves, but this Reddit post includes the experience of another user.